Question

1. Define and clearly label a general thermodynamic system (schematic) that interacts with a representative house to analyze in this feasibility exercise with the available energy source. Justify and describe your schematic based on basic thermodynamic principles. What is the primary function of a cooling system? 2. Reproduce your schematic and identify the energy and mass flows (rate basis) in and out of the system using symbolic representation in addition to the various quantities in the problem 3. Represent the geothermal process liquid from inlet to exit on a T-s diagram. Do the same on a h-s diagram. Explain your sketches. 4. With appropriate assumptions (which MUST be listed and justified) write down the mass balance and energy balance equation(s) on a rate basis for the system using your representative symbols and an appropriate control volume. Clearly identify your control volume on the schematic in part (2). Number your equations clearly and sequentially 5. Write down an expression, with the appropriate control volume, (using your symbolic representation of the various quantities) of the entropy balance of your system (CV) on a rate basis. Number your equation sequentially 6. By appropriately combining (not MANIPULATNG!!!!) your derived basic equations, obtain an expression (in symbolic form) for the MAXIMUM cooling rate that can potentially be obtained from the geothermal energy source. Explain why this is the maximum? Note: The cooling rate is the rate at which energy is extracted from the house to achieve cooling. 7.By determining the various thermodynamic properties based on the data provided in the problem and the tables, determine the value of the maximum cooling rate in kW. Show details of all work neatly and clearly. 8. What is the availability of the energy source? 9. What is the availability of the fluid leaving the system? 10. Comment on your results. What are the takeaways from this exercise and what are the implications on the practicality of the results obtained? Your thoughts.

Answer 1

Heat Pump is a thermodynamic system. It transfers heat from a cooler to a warmer body by receiving work.. plus AMBIENT To 56 - HOUSE TE 25°C OLIA - SHL I Win > Heat Pump Hy OH I Ambient acts as low temperature in the source. House acts as high temperature sink. source is electricity which does Available energy work Feasibility of Ist Law of Thermodynamics . For any thermo dynamic system, first law is the energy balance equations, Energy heat input to system O tW Energy output from system & Pretention Eino tout Q: Quo Win - Wina By- Work Required

Feasibility a second law a thermodynamics Kelvin Planck statement o"It is impossible to construct a device which operating in a cycle will produce no effect other than raising a weight and exchange of heat with a SINGLE Heat Reservoir". Here we use two reservoirs so Kelvin Plank statement is not violated. Classius statement "It is impossible to construct a device which operates in a cyce and produces no effect other than transfer of heat from a cooler to hotter body". so classius statement Here we have supplied work is borde valid, Primary Function of cooling system A cooling system's primary purpose is to extract heat from a body at lower temperature and reject it to some higher temperature sink on еxрежде чем о®ік ігри: . An air conditioner however abo control the moisture along with temperature to maintain Cyn

conditions for humans. the comfortable