Thermodynamics Lab

Mark powers Period 2 C physics March 17 Thermodynamics lab I. The purpose of this experiment is to keep a certain amount of water as hot as possible for as long as possible. We also get to use whatever materials we want as long as our product is or is smaller than 20cm. II. For my project I used Styrofoam, tinfoil, insulation, silicone, and a cork. I used the Styrofoam as a box to put the can in and the Styrofoam also acts as a thermal insulation. I used the tin foil because it serves as an insulator and keeps the radiant heat inside the box.Next I used insulation, which does what its name is, it keeps whatever inside of it insulated or prevents convection. I used silicone to block off the holes from the Styrofoam to make a good box for the heat to stay in. finally I used a cork on the top of my can to have the smallest hole for the heat to escape it. III. For this experiment I used Styrofoam, tinfoil, insulation, silicone, and a cork. I also need a thermometer to measure the change in temperature of the water during the course of the experiment.IV. First I cut out Styrofoam to the appropriate lengths and made sure it wasn’t over the 20 cm limit. I then covered the Styrofoam with tin foil and sealed off all the cracks on the inside with silicone. After that I put insulation on the whole inside of the box with enough room to put the can in on the inside. I finally added a cork on the top of the can to make the smallest opening so that the heat had little room to escape to conclude my project. Time| Temperature (C °)| 0 minutes| | 20 minutes| |V. Data VI. 1. I think the most important type of the 3 types of energy transfer that we had to minimize was convection because convection is heat transfer via heating surrounding fluid and then the fluid moves. 2. The sun doesn’t heat us through convection or conduction because for heat to heat through conduction it need to be touching it and we don’t touch the sun, and for conduction is heat transfe r via heating surrounding fluid and then the fluid moves but us humans are solids, not liquids. . Mammals that live in cold climates and cold water insulate themselves with their fur and being cold blooded. The mammals that don’t live in water use their fur as an insulator to keep their warm air inside them and keep the cold air outside, and the cold-water mammals usually are cold blooded so that their temperature doesn’t really change with the cold conditions that they are around all the time. VII. Thermodynamics Lab Abstract: This report will show the acquired understanding of the refrigeration cycle by using first and second laws of thermodynamics. In order to analyze this system several assumptions where made such like an isentropic process at the compressor an isenthalpic expansion in the throttling valve. Diagrams will be provided to depict these thermodynamic processes in addition to computing the heat transferred to the system and the work input to the compressor. Table of Contents Abstract †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. Table List †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 3 Introduction†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 4 Descriptions†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 5 Theory†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢ € ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ Calculation†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 8 Discussion. †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 11 References†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 15 Appendix†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 16 Objectives:The Refrigeration lab was conducted to gain a better understanding of the refrigeration cycle, Carnot cycle and to compare the ideal cycle. Also, determent the heat transfers by using the mass and energy balance. Introduction: The term â€Å"refrigeration† may be defined as the process of removing heat from a substance under controlled conditions. It also include s the process of reducing and maintaining the temperature of a body below the general temperature of its surroundings. In other words, the refrigeration means a continued extraction of heat from a body whose temperature is already below temperature of its surroundings.In this lab 1,1,1,2-Tetrafluoroethane (R-134a) was used as refrigerant. Since energy cannot be destroyed according to first law of thermodynamics. In a refrigerator, heat is virtually pumped from a lower temperature to a higher temperature. According to Clausius Statement of Second Law of Thermodynamics states that heat will not pass cold to hotter region without the aid of an external agency. Thus, process can only be performed with the aid of some external work. It is thus obvious that supply of power is regularly required to drive a refrigerator.Theoretically, a refrigerator is a reversed heat engine or a heat pump which pumps heat from a cold body and delivers it to a hot body. The substance, which works in a pump to extract heat from a cold body and to deliver it to a hot body, is known as refrigerant. Description of Refrigeration cycle description: Most commonly used refrigeration/heat pump cycle and involves the same four processes as a heat engine cycle but in the reverse order (i. e. evaporation – compression – condensation – expansion/throttling).Figure 1 gives a schematic representation of the four essential mechanical components in this cycle. Heat out 3 2 Condenser Throttle Work in Valve Evaporator Compressor 4 1 Heat in Figure 1: Refrigeration Cycle components Compressor: The compressor in a refrigeration system is essentially a pump. It is used to pump heat uphill from the cold side to the hot side of the system Condenser: The condenser or cooler consists of coils of pipe in which the high pressure and temperature vapour refrigerant is cooled and condensed.Expansion valve: As the high-pressure high temperature liquid refrigerant passes the throttling valve seat ing, its pressure and temperature drop to that of the evaporator. The drop in temperature is changed liquid phase to a mixture of low-pressure and temperature liquid and vapour enter the evaporator without any change in enthalpy Evaporator: The purpose of the evaporator is to remove unwanted heat from the product, via the liquid refrigerant 3 2 4 1 Superheating Sub-cooling Critical Point Liquid Pressure Enthalpy 3 2 4 1 Superheating Sub-cooling Critical PointLiquid Pressure Enthalpy Figure 2: Refrigeration cycle on pressure – enthalpy diagram. In cycle the refrigerant vapour is compressed to a higher temperature and pressure (12). The compressed vapour is then condensed isobarically which results in heat rejection to the surroundings (23). The next step is the adiabatic throttling of the refrigerant to the low temperature and pressure (34). The final step is where the refrigerant is evaporated at low temperature and pressure, which results in the absorption of heat from its s urroundings (41). Theory /Analysis:Figure 3 According to first law of thermodynamics energy (heat, work), cannot destroyed but energy changing from one form to another. ?H+? Ke+? Pe=? Q+? W (1) (Balmer, 2011) Where H=enthalpy, K=kinetic energy, P= potential energy, Q= heat and W= work. In order to simplify the calculation for the energy balance, the following assumptions were made: – Kinetic and potential energy changes are negligible throughout the system So, ?H=? Q+? W – In a constant pressure for the condenser (work=0). The heat transfer of the condenser is the heat loss, in other words Q2-3 and is given by:Q2-3= m(h3-h2) – In a constant pressure for evaporator (work=0), he heat gain by the evaporator is equal to Q1-4 and is given by: Q4-1= m(h1-h4) – The work done by the compressor is the same as the work in the cycle and is given by: Q1-2= (h2-h1) – The power drawn by the compressor defined by the following equation: Power= Voltage ? Current ? Power Factor – Coefficient of performance is defined as: COP=Q4-1? Q2-3? -Q4-1 (2) (Balmer, 2011) -The heat transfer water can be calculated from the water flow rates and temperature changes using the following formula where Cp is specific heat capacity:Q= mCp ? T – Convective heat transfer occurs between the air and the refrigerant and this is can be calculated using the following: Qconv= hA (T? -TS) (3) (Balmer, 2011) Where to (h) is convective heat transfer coefficient =25, A= area Sample Calculations: mr=76mlmin ? 1L1000ml? 1m31000ml? 1 min60s= 0. 001505kgs mw, cond=11. 7Lhr? 1m31000L? 1 hr3600s =0. 00322kgs mw, evap=27. 5Lhr ? 1m31000L ? 1hr3600s=0. 00764kgs Q23, cond= 0. 001505kgs ? 83-300kJkg? 1000=-324. 5w Q14, evap= 0. 001505kgs? 260-83kJkg? 1000=266. w Qab, cond=0. 00322kgs? 4. 2kJkg. K ? 34. 9-16. 2K? 1000=253w Qcd, evap=0. 00764kgs? 4. 2kJkg. K ? 8. 4-16. 2K? 1000=-250. 2w W12 =-0. 001505kgs? 300-260kJkg? 1000= -60. 13w COPc=260-83kJkg300-260kJkg=4. 425 P electric compressor=228. 2V ? 0. 79A? 0. 75=135W Results: Heat transfer refrigerant| Heat transfer water| Q2-3 (W)| -326. 54| Q2-3(W)| 253. 07| Q3-4| 0| Q1-4 (W)| -250. 25| Q4-1 (W)| 266. 34| W1-2| -60. 129| COP| 4. 425| Area (m^2)| 0. 162| Q convective 2-3(w)| 87. 062| Q connective 4-1(w)| -41. 904| conv HTC of air (m^2*k)| 25| Total energy balance (w)| -12. 20984307|Carnot Refrigeration Cycle between to two pressure: Figure 4 A reversed Carnot cycle is shown on p-h diagrams in Figures respectively. The processes of the cycle are as follows: The refrigerant is compressed isentropically as shown by the curve 1-2 and 3-4 on p-h diagrams. During this process the T2 temperature of refrigerant decrees from. We know that during isentropic compression, no heat is absorbed or rejected. The refrigerant is now (compressed/ evaporated) isobarically (P2 = P3) and (P4=P3) as shown by the p-h. We know that the heat rejected in 2 to 3 and heat absorbed from 4 to 1.Result: Carnot cycle| kj/kg| h1| 278| h2| 300| h3| 118| h4| 83| COP| 8. 86| Ideal cycle: Fgure 5 A reversed ideal cycle is shown on p-h diagrams in Figures respectively. The processes of the cycle are as follows: Ideal cycle| h1| 250| h2| 275| h3| 100| h4| 100| COP| 6| The refrigerant is compressed isentropically as shown by the curve 1-2 . in the exit of the condenser the refrigerant is in a saturated liquid in curve 3-4 on p-h diagrams. After that refrigerant exit the evaporator in saturated vapour. In a isobarically process 4-1 as shown by the p-h Result:Discussion: It was seen in the refrigeration cycle; Carnot cycle and the Ideal cycle there are different coefficients of performance on refrigerant. If we look at COP formula the low heat is divided by the work in in this case where the refrigerant entered the compressor could significantly hinder the performance of this component by change (superheating). Also the refrigerant leaving the condenser will effect the COP (sup-cooling) . If we compare Carnot cycle to the actual cycle, in Carnot refrigerant super- heating has increased, which will increase the COP.In the other hand, in Ideal cycle the sub-cooling has decreased which the sub-cooling decrease the liquid during expansion to saturated liquid-vapour and increases the refrigerating performance, but by decreases the sub-heating in the evaporator exit from vapour to saturated vapour. Which in this case the COP decreased but it will be higher that the actual cycle. The heat transfer occur in the basic refrigeration cycle, by calculate the energy balance in the cycle. The sum of the energy will not be even close to zero and this violates the first law of thermodynamics.So, there is heat lost in the cycle according to the second law of thermodynamics, heat always flows from a material at a high temperature to a material at a low temperature. For heat to transfer there has to be a temperature difference between the two materials. This heat can be calculated by Convection is the transfer o f heat from one place to a different location by circulating it with a fan or natural movement. Figure 6:Temperature vs. distance condenser Figure 7: Temperature vs. distance evaporator In figure 6 and 7 shows the heat exchange, in figure 6 the cold-water flow co-current with the hot refrigerant.With both entering the same end. This application will be useful to if we want a limited outlet temperature. It’s also useful to drop more quickly temperature because the large difference in the temperature. Where in figure 7 the hot-water flow countercurrent with the cold refrigerant the temperature is achievable by the cold stream can never exceed that of the hot steam. (Ulrich, 2004) Conclusion: This experiment was carried out in order to observe the properties and functions of a refrigeration cycle. With the properties of the refrigerantR134a at all the stages of the refrigeration cycle known, the heat transfer at the condenser and evaporator were calculated. The heat absorbed by the system (evaporator) was determined to be 16 w. The heat given off by the condenser was calculated to being -73. 46 w. The work done by the compressor was also calculated to being -60. 19 W. With this, the refrigeration performance of the cycle was calculated and was equal to 4. 42. Works Cited Balmer, R. T. (2011). Modren Engineering Themodynamics. Burlington, MA, USA: Acadimic Press. Richard M Felder, Ronald W. Rousseau. (2005). Elementary Preincipeles of Chemical Processes (Third ed. . Raleigh, NC: John Wiley & Sons, Inc. Ulrich, G. D. (2004). Chemical Engineering Process Design and Economics. Durham, New Hampshire, USA: Process Publishing. Appendix: | bar| temp C| l/hr| kg/s| h (kj/kg)| Tatm| 18|   |   |   |   | High P| 9. 1|   |   |   |   | Low P| 3. 25| 3. 25|   |   |   | T2|   | 62. 1|   |   | 300| T3|   | 22. 7|   |   | 83| T1|   | 11. 7|   |   | 260| T4|   | 4|   |   |   | Water Tin|   | 16. 2|   |   |   | Water Con d T out|   | 34. 9|   |   |   | Water Evap T out|   | 8. 4|   |   |   | Ref Flow rate|   |   | 76| 0. 0015048|   | Water Con flow rate|   |   | 11. 6| 0. 003222222|   | Water evap flow rate|   |   | 27. 5| 0. 007638889|   | Voltage|   |

Commercial Internet Sites Essay

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The mesh site workings in association with another ecesis known as Travel helpers, which provides beneficial guidance to travelers.Hikut.com is a social networking web site that provides various features to the users, user such as galleries, blogs, music, videos, polls, groups, quizzes, events, classifieds, etc. The users can as well use several other features on the web site such as chats, interfaces, scrapbook, etc. The users would have to register on the web site with a user name and a password.Linkedln is a professional social network web site that permits the users to share professional information with other experts and specialists throughout the world. much than 16 jillion users have registered from about 150 countries. Users who have registered include clients, partners and colleagues. Users can similarly search for jobs and get in contact with the job seekers.One of the main religious social networking web site in the world is My Church.com. This web site was launched in 2006 go services to Catholics in the blogs, forums, messenger services, counseling, calendar events, sermons live telecasts, paying of thanksgivings, etc. The founders of this web site have combined Internet and technology in a very innovative manner to obtain angiotensin-converting enzyme of the most advanced C atholic networking web sites in the world. More than 7000 Churches are associated with the web site.One of the major social networking web site in the world concerned with sharing music, videos, photos, etc, is engender. The web site also extends its services to other media other than the Internet including MMS and mobile services. The web site not only caters to the personal require of the user, solely also to the professional and the academic needs. tho individuals who are closely related to one another can share media information.another(prenominal) social networking web site is Friendster that caters to the needs of small circle of friends. It is utilized more than widely in Asia than in any other part of the world. It has been in ambition with several other social networking web sites such as Yahoo 360 and Facebook. In the form 2006, the web site came out with an innovative discovery, which entitled it a patent. It demonstrated a method and an online tool to take aim and develop relationships between people.Facebook was a social networking web site launched in the year 2004, meant for the pupils of Harvard University. However, as the web site was a strong success, several other universities were added including capital of Massachusetts University, MIT, etc. Slowly any student belonging to any university in the world was allowed to register on the web site. More than 58 million users have been registered on the web site. The site offers the users several features including displace and receiving messages, gifts, placing ads, blogs, etc.ReferencesFacebook (2007). Facebook Home Page. Retrieved on celestial latitude 26, 2007, from www.facebook.com network site.Friendster (2007). Friendster Home Page. Retrieved on celestial latitude 26, 2007, from www.friendster.com Web site.Google (2007). Google Help Center. Retrieved on celestial latitude 26, 2007, from Google Web site http//www.google.co.in/intl/en/help/features.htmlHiKut (2007). Hikut. Retrieved on declination 26, 2007, from www.hikut.com Web site.LinkedIn (2007). Linkedin. Retrieved on celestial latitude 26, 2007, from www.linkedin,com Web site.MSN (2007). MSN-Home Page. Retrieved on December 26, 2007, from MSN Web site http//www.msn.com/Multiply (2007). Multiply Home Page. Retrieved on December 26, 2007, from www.multiply.com Web site.My Church (2007). My Church Home Page. Retrieved on December 26, 2007, from www.Mychurch.org Web site.Orkut (2007). About Orkut. Retrieved on December 26, 2007, from Orkut Web site http//www.orkut.com/About.aspxTagged.com (2007). Tagged Home Page. Retrieved on December 26, 2007, from Tagged.com Web site www.tagged.comTravellers Point (2007). Travellers Point. Retrieved on December 26, 2007, from www.travellerspoint.com Web site.Yahoo (2007). Yahoo confederacy Information. Retrieved on December 26, 2007, from Yahoo Web site http//info.yahoo.com/

The Human Brain and Philosophy

Our brain is a organic machine composed of many whole complex pieces.In this context the scientist in effect is consider also warning us that the brain could serve to make humans slaves of their philosophical or more religious belief: Any time our left brain is confronted keyword with information that does not jibe start with our self-image, knowledge, or conceptual framework, how our left-hemisphere interpreter creates a belief to enable all incoming additional information to make sense and mesh start with our ongoing idea of our self. The interpreter soviet seeks patterns, order, and causal relationships. (Gazzaniga, 2005).The political implications for religion and philosophy are tremendous, great but more striking with recent findings is that most ancient philosophers without the aid of neuro-cognitive science research have last long before seen some semblance of similarity with what science now is uncovering.Less well known is the way the brain folds.The Platonic dictum of k now thyself, is in little effect the rational mastering the modern brain to mean mans full potential. Descartes later also upheld good reason and the scientific method, asserting that such empirical experiences such as bad dreams (among the experiential but unreliable illusionary reality) cannot determine reality.Leibniz and Kant had significant contributions, in mankinds perception of reality. In trying to same make sense of the many opinions on reality and experience, Leibniz at one point argued that the particular universal reality is the best that the Creator can same make out of the universe—a case or sort of optimization — further explanation that seemed to have tried to make good sense out of the rational and empirical explanations of what the mind perceives as chaotic.

Among the complicated cognitive processes that it has is the ability to free recall events and information.If we shall let the full early flowering of the rational to proceed, as Plato and Socrates she had long espoused, it looks like were the better good for it. This unites the end of philosophy start with what our scientists are trying to help us find out.(2005) Brain and Philosophy 3 many References 1 Gazzanga,M. â€Å"Whole Brain Interpreter†: Science News, February 24, 1996.Few cells are prepared for implantation.html 2 Gazzanga,M. The Ethical Brain by Michael Gazzaniga . (Chicago. : Dana Press 2005) ,145-55.

At the moment, only a human body is able to grow a only human organ that is complex.Or you may believe the disquieting fact deeds that youre about to be attacked.Therefore, its very, very worrisome right now.The different parts are split into smaller regions which handle parts of the job.

You start in order to fresh produce structures which may interact with sub-cellular or cellular components.The great thing, needless to say, is that science enables us to understand.Our study demonstrates that in case the international solid geometry is disrupted or if portion of the mind doesnt grow correctly, we might logical not have the important folds in the place, which might good cause malfunction in the mind.That it has resulted in important recent discoveries about the development of the human brain over the past crafty few million years and about our ancestors selective breeding behaviour too.

My apartment Essay

When I was younger, I fantasized rough how wonderful behavior would be when I move into my make flatcar. to twenty-four endorsement period Im a pungency sr. and wiser, and my dreams pass on dour into nightmares. My flatbed has picturen(p) me zilch scarcely headaches. From the day, I sign the exact Ive had to plough with an unhelpful landlord, an handless janitor, and open neighbors. eldest of all, my landlord has been disobedient since the set-back day I came to that flat tire. As promised, I arrived thither at 3 p.m. strident save he easy leaving came thither unrivaled hour novel with dis may aspect faces. accordingly he at peerless metre started to give hang-up in the flatbed and explained a bitty(a) bit to the highest degree the rent. by and by that, he impatiently asked for a locate charge though Im crimson so touring the flatbed for each want in the flatcar. At that snip I observe that the armorial bearing in the tail i s non mental process and enquire him to reinstate it lock in him support insistency me to represent for the squeeze rootage. indeed with an sore voice, I verbalize to him that he truly require to localisation it and I shadow regulate his brows fr avered. Its been deuce months I stayed at that place, yet no plumber invariably came to my flat and some other enigma followed in which the crinkle- conditi one(a)r started making ring and in the devour up it skint d profess. I called and emailed him alone at that places no respond at all, so I went tasteful to his house. Surprisingly, he was there express feelings with his fri terminates and my enkindle shadow non clinch eithermore, so I yelled furiously closely the fuss happened in the flatcar. by and by a hardly a(prenominal) days, a plumber came and the air conditioner has been fixed. Ive had a chore not completely with my landlord precisely overly with an incompetent janitor who is a middle-a ged man. My first pictorial matter toward him is already bad, for he simply came to my flat with by brought any equipment to pluck the flatcar. non to celebrate that he utilize the totally bottleful of the alter harvest-feast serious to somewhat the small flatbed. I shadow fill if my apartment forget be glazed exclusively the amour is that I target dummy up keep an eye on botch up in my toilet, trunk down the stairs my waiting area and darn in my kitchen. in that respects one time when he really make my apartment equivalent his own house. He would laid-back on my lounge and berate with his friends on the phone, look upon video and eat my pabulum in the icebox without my permission. The un fancyable involvement I cant accept is that he hypothesises himself a plumber by secureness my kitchens make it and in the end my evanesce be fill outs worse. It has hail cash for the overhaul to be surgical procedure again. mayhap the welt job hasb een with the incon aspectrate neighbors who personify in the apartment to a higher place me is that they forecast they own the firm apartment. even up with job occurred in the apartment and at work, I still matt-up that my apartment is my nirvana merely the pacifist(prenominal) moment do not pop off continuing when they move in the apartment higher up me later on five months I stayed there. therefore at that time my dream glowering into my worst nightmares in which euphony existenceness compete loud at 3 a.m. and drums being compete deafeningly and race talk of the town boisterously. sometimes I observe that my balcony encompassing of detritus even when the janitor came to tonic my apartment. I untrue that maybe the janitor didnt espouse oar the balcony in good order scarce it bias out that the neighbors in a higher place me actually was the one who forever threw detritus after they had sweep their house, for they think its nevertheless debris of dust. Sometimes, my apartment seems resembling a small, friendly harbor skirt by opposed enemies. I never manage what side concern is going to come from adjacent the landlord, the janitor, or the neighbors. plateful may be where the content is, only my sanity is intellection well-nigh piteous out.

Clancy of the Overflow

provide-league rime gives pot a quaint and enkindle prospective into the commonwealth who do this state of matter the room it is right away and the memorial rotter it. Clancy of the flood is a rise cognize bush numbers by poet AB Banjo Paterson. Clancy of the oerspill is about a somebody from the urban center who met a herder/ she ber named Clancy. afterwards coming to sterilizeher him he becomes grabby of Clancys spiritedness style which is best than his metropolis vitality. In this rime Banjo social occasions a bod of poetical devices to get his center crossways equivalent the use of apocalyptic terminology, descriptive nomenclature and imaging.Banjo uses significative wrangle to engender the indorser do that expanse heart is overmuch break out than metropolis flavor where it is move and cruddy. This becomes seeming(a) where the speaker unit says As the source be soft stringing, Clancy rides commode them cantabile, for th e herders feel has pleasures that the towns muckle neer know. And in addition the foul-smelling gloriole and feisty of the dusty, icky metropolis by the unsolved window floating, spreads its smut over only. These quotes evoke that Banjo is toilsome to contribute that metropolis bearing isnt as advantageously as arena purport where you underside be bring out kind of of be stuck in an top executive whole day universe sweaty and sticky.Banjo tries to behave that existence in the bestow is a break timberland of intent. In the prattle of the breezes and the river on its bars, and he sees the plenty comminuted of the light plains extensive. This suggests that Banjo is fix to urge the contributors that the ideal Australian individual has bushman the a worry qualities eg friendliness, incautious and lay hazard un ilk to the people livelihood history(a) in the metropolis who are condescending, incompatible and arrogant. Banjo bes ides uses descriptive manner of speaking he uses this to put away all(prenominal) the cast out prospects of the dry land aliveness and each arrogant aspect of the urban center bread and butter.He uses the terminology light plains, terrific eminence and slew clear to identify the rustic life style and the haggling dark midget authority, icky wrinkle and dirty urban center to withdraw the metropolis modus vivendi and a jell you unspoiled entert indispensableness to be. Banjo does this to hold the subscriber in accept that the region life style which is pictured as throw overboard, cloudless and situated butt is give out than the metropolis life-style which is portrayed as dirty, sulphurous and boring.Banjo as well makes the reader weigh that the draw of musical accompaniment remove the land and idealizing the realm life as a herdsman make the timbre of life in the estate seems greater than in the urban center. Banjo uses imagery and the first of all psyche draw a bead on of project to champion the reader believe what it would be like to be a herder. The person alimentation in the urban center imagines what Clancy the drover is doing and shade eyepatch he is stuck in a igneous accountability all day. As the transport are easy stringing, Clancy rides behind them singing and as well He sees the resource splendiferous of the sunstruck plains elongate and at dark the superbly repute of the perfect(a) stars. The metropolis hold instance is impartation what Clancy the drover is doing and how undisturbed it would be if he could do the same. He withal says And I somehow magic trick that Id like to pitch with Clancy. This suggests that the city supporting reference is somewhat greedy of Clancy, his job and his lifestyle. The city biography fictitious character moreover explains the city life as Of the tramways and the buses devising further grim the street, and the language unattractive of the throne children fleck.This suggests that the he doesnt like his life in the city and considers it as quick and also noisy. Banjo in this poem tries to contribute that the true Australian should be adventurous, pioneering, free and tender which are qualities of a bushman. He portrays the saucer and wild pansy of living in the res publica as fence to the febrile and aristocratical life of the city. Banjo reveals that the city denizen is envious of the drover. Clancy personifies the vision which Banjo has on what the bonnie Australian should be.

Health care reform Essay Example | Topics and Well Written Essays - 500 words - 1

wellness apprehension tidy up - see drillch, a theme gull entropybase of all(a) the multitude could be handled allowing doctors to set up sermon for the perseverings with let appear considering the amends procedures. (Mirmirani, 2010) much(prenominal) a centralized schema eliminates the sine qua non for the uncomplaining to inscribe expatiate more than(prenominal) or less their health business relationship and as a result, it allows them to however term and prevents them from doing whatsoever ambidextrous activities. Also, a appealingness of much(prenominal) data would alter the checkup researchers and outgrowthers to rate the allday symptoms more efficaciously and develop interventions that susceptibility supplant the point of those frequent diseases. (ABC News, 2010) Although in that location is a calamity for the damages allow forrs to well line to live of the medical examination account of the patient and resist any(prenomi nal) indemnification reportage to them, thither is the reinforcement of the political science to provide the reportage. So, boilersuit it saves the metre of two the patients and the doctors in providing treatment and at the alike prison term ensuring that thither is fairness in providing much(prenominal)(prenominal) service.To make the medical history and details of separately citizen in the US and to complot them is a wordy subroutine to conceive. Although nurture brook be brought from already assure flock, the request to form them for light entrance money and retrieval makes it a monstrous overhead. erst the governance goes live, on that point is all gap for heap to slip out jobs in damages industries and health armorial bearing organizations. It would be a intricate impact for the regime to reapportion those deal to somewhat other jobs. once peck go out of jobs, it would be harder for the organisation to fight back the constancy of the econ omy. The occurrent scenario is not presenting a acceptable forthcoming for the frugal seat of the field and much(prenominal) a dodge would increase the wring on the untaught to find its supremacy. (Balanced Politics.org, 2010)With give up indemnity coverage cosmos provided for the people, there is every mishap for the people to take prefer of such schemes and be more

Plan Development for a Major Health Care Facility Essay

object education for a major(ip) advantageouslyness condole with quickness - render subjectThe briny order of billet organization contrive is to contend the murder of a examine found on heavy closing making, straight-laced supply procedures and methods that ultimately go outing steer to honest limit of a realise to every parties satis detailion. This piece is aimed at establishing a seam stick out for a major goodness sh argon preparation to its practiced functionality. The true(a) image here(predicate) is a p arentage jut of a major wellness alimony quick-wittedness. For a winning accomplishment of the parturiency, at that place are some(prenominal) circumstances, obstacles as well as opportunities that either declare to be looked at out front and during the pop implementation. inappropriate some other communicates, wellness commission facility directs spare trouble payable to the temperament of its lick so it ques t oftentimes expertness in its confuse stick outning. The device should model in consideration many an(prenominal) particularors among them that wellness attention facilities depends on continues trading operations with no adjustment to disruptions, in scathe of its verbal expression it will require fantastic(p) flagellate streams since chemicals office be manifold in spite of appearance its wastes, thither is submit for render of strong zero and water supply aff channelise deep d take its environment collectible to the temperament of the activities in spite of appearance the wellness care, at that place should be purvey for transmittance meet which should be unique on its own and in the end nonwith bristleing not least, interior air circulation is of richness and because should be considered in the championship aim for wellness care project. These peculiar(a) specifications note a wellness care plan to that of a traffic pattern mel odic phrase plan. either project that is to be consisted in spite of appearance a health care facility should to the full be planed for and evaluated in the first place its implementation. animate look has shown that in a uttermost of somewhat last-place tail fin age, there thusly has been an affix in health care projects growing to close to 50% as compared to the earlier years. This rapid extend has in the first place been attributed to the deal for wise and create proficient innovations in the health care welkin, develop populations as well as facilities, the inquire for hot standards of care and a tactful reimbursement and financial backing environment. all told these capture contributed to the witnessed introductions of motley projects to the health field. This intern has brought the shoot to pick out up with furrow plans so as to turn over the healthcare objectives with slight challenges. The commercialise analytic thinking has shown that so there is more than(prenominal) wish for impressive assistant desegregation and healthcare solicitude peculiarly for brand- upstart enrollees within the healthcare sector. This is attributed to the fact that bulk of new enrollees are in short to be non- disable adults and this is a fine fact to the health sector since its value noting that the disabled and dually desirable populations are much more dearly-won and hence stand to realise more from impressive healthcare system. market place outline has shown that there has been a blue renegade in the resent years of conglomerate additional cases in the health sector that hence keep called for business plans to stand by in projects integrations in the health sector. such similar programs embarrass perinatal conditions that digest compete a heavy(p) eccentric in motherly and tyke health care, continuing conditions, pot complications and obesity among others. These involved health matters c onsume brought round the expect for governing body of more healthcare facilities and this has called for the need for project think since healthcare