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21 Cards in this Set
- Front
- Back
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Cooling mode |
Condenser outside Evaporator inside |
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Heating pump mode |
Evaporator outside Condenser inside |
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Normal refrigeration cycle |
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Universal gas constant, R (bar) = |
R (bar) = 8.3145 kJ/kmol K |
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Gas constant equation |
R = R (bar) / molar mass of compound. |
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1st law of thermodynamics |
E = mu + (1/2)m V^2 + mgz |
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Conservation of mass |
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Specific heat transfer |
Q is heat transfer during a process and m is unit of mass transferred between same two points during process. |
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Enthalpy, h |
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Boiler: purpose, given, assumptions |
Purpose: bring substance to vapor state. Given: w = 0 Assumption: P= constant |
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Compressor: Purpose, Given, and Assumption |
Purpose: Bring substance to higher pressure. Given: w(in) Assumption: q = 0 |
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Condenser: Purpose, Given, and Assumption |
Purpose: Take q out to bring substance to liquid state. Given: w = 0 Assumption: P = constant |
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Evaporator: Purpose, Given, and Assumption |
Purpose: bring substance to vapor state. Given: w = 0 Assumption: P = constant |
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Heat exchanger: Purpose, Given, and Assumption |
Purpose: transfers heat from one medium to another. Given: w = 0 assumption: P = 0 |
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Nozzle: Purpose, Given, and Assumption |
Purpose: create KE; P drops Given: w = 0 Assumption: q = 0 |
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Pump: Purpose, Given, and Assumption |
Purpose: same as compressor but handles liquid. Given: w (in) and P goes up Assumption: q = 0 |
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Turbine: Purpose, Given, and Assumption |
Purpose: create shaft work from high P flow. Given: w (out) Assumption: q = 0 |
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Valve: Purpose, Given, and Assumption |
Purpose: controls flow by restriction; P drops Given: w = 0 Assumption: q = 0 |
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Thermal efficiency |
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Coefficient of performance (COP), Beta |
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For basic processes of a Carnot cycle: |
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