why the coefficient of performance K is defined as Qh / W.
why the coefficient of performance K is defined as Qh / W.
Homework Answers
If (QH/t)eng = 115 W, (QC/t)eng = 104 W, and (QH/t)ref = 165 W then: i)...
If (QH/t)eng = 115 W,
(QC/t)eng = 104 W, and
(QH/t)ref = 165 W then:
i) What is the thermal efficiency of the engine? η = ?
(3sf)
ii) What is the coefficient of performance of the refrigerator?
K = ? (3sf)
An engine is used to run a refrigerator as shown in the figure below. engine refrigerator H-eng C-ref H-eng QC-ref C-eng H ref where TH-eng-495 K, Tc-ref = 277 K, and T= 292 K.
1. Consider a Carnot cycle where Th=1000. K and Tc=300. K. The heat absorbed, qh, is...
1. Consider a Carnot cycle where Th=1000. K and Tc=300. K. The heat absorbed, qh, is 200. kJ. What is the entropy change for the entire cycle? 2. Consider a Carnot cycle where Th=1000. K and Tc=300. K. The heat absorbed, qh, is 200. kJ. What is the entropy change for the adiabatic expansion? 3. Consider a Carnot cycle where Th=1000. K and Tc=300. K. The heat absorbed, qh, is 200. kJ. What is the entropy change during the isothermal...
TIUVICU TU. A refrigerator has a coefficient of performance of K = 2.1. Each cycle, it...
TIUVICU TU. A refrigerator has a coefficient of performance of K = 2.1. Each cycle, it absorbs 3.75x104 J of heat from the cold reservoir. The refrigerator is driven by a Carnot engine that has an efficiency of e=0.5 Eckboard - The Cit x Bb Pre-Lab Assignments - 201 X C Six HepID=9ca21d320b455f2dffd7601af0f84482#10001 Part A How much mechanical energy is required each cycle to operate the refrigerator? Express your answer in joules to two significant figures. IVO ALDO a ?...
the coefficient of performance of an irreversible The coefficient of performance of a reversible refrigeration cycle...
the coefficient of performance of an irreversible The coefficient of performance of a reversible refrigeration cycle is always refrigeration cycle when each operates between the same two thermal reservoirs. greater than equal to less than
4. A proposed heat pump would use Win - 30 W of power and supply QH...
4. A proposed heat pump would use Win - 30 W of power and supply QH 300 W of heat to a room at TH 30 °C. The heat pump would draw in heat from an environment at T 5 °C. a) Using the Clausius inequality, show whether this heat pump is possble or not. If possible, isitreversible or irreversible? b) Repeat part (a) using the Carnot principles.
What is the possible maximum coefficient of performance for an ideal refrigerator operating between a reserve...
What is the possible maximum coefficient of performance for an ideal refrigerator operating between a reserve at a temperature of 2.0 K and another reserve at a temperature of 0.020 K?
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v)...
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v) where σ"n and σ,v are the effective horizontal and verti- cal normal stresses. For the soil stratum shown, Ko is determined to be 045, the saturated soil density Ysat is 18 kN/m2 and the water table is 2 m below ground surface. 2 m (a) Assuming the soil is saturated to ground surface and there is no seep- age, plot the at-rest (geostatic) σν,...
A Peltier cooler is a heat pump that can be set to either cool or heat...
A Peltier cooler is a heat pump that can be set to either cool or heat its contents. One such cooler uses 100 W of input power whether heating or cooling. Which is greater, its coefficient of performance for cooling or its coefficient of performance for heating? netyplugintie pho/1817827m COP oing cWn COP,eating = QH / W Heat pump W. A. Cooling B. Heating in 100 J/s C. The two coefficients are the same.
A heat pump has a coefficient of performance of 3.90 and operates with a power consumption...
A heat pump has a coefficient of performance of 3.90 and operates with a power consumption of 6850 W. (a) How much energy does it deliver into a home during 4 h of continuous operation? (b) How much energy does it extract from the outside air in 4 h?
Goal Solve for the performance coefficient of a refrigerator using a five- step process the includes:...
Goal Solve for the performance coefficient of a refrigerator using a five- step process the includes: 1. Making a state table. 2. Making a process table. 3. Calculating the totals for Work, Heat, and Internal-Energy-Change. 4. Identifying the heat input (cold reservoir) and output (hot reservoir). 5. Calculating the performance coefficient of the refrigerator. isothermal Problem Shown in the figure to the right is a cyclic process undergone by a refrigerator. Your refrigerator shall use 8.0 moles of helium gas...
If (QH/t)eng = 115 W,
(QC/t)eng = 104 W, and
(QH/t)ref = 165 W then:
i) What is the thermal efficiency of the engine? η = ?
(3sf)
ii) What is the coefficient of performance of the refrigerator?
K = ? (3sf)
An engine is used to run a refrigerator as shown in the figure below. engine refrigerator H-eng C-ref H-eng QC-ref C-eng H ref where TH-eng-495 K, Tc-ref = 277 K, and T= 292 K.
TIUVICU TU. A refrigerator has a coefficient of performance of K = 2.1. Each cycle, it absorbs 3.75x104 J of heat from the cold reservoir. The refrigerator is driven by a Carnot engine that has an efficiency of e=0.5 Eckboard - The Cit x Bb Pre-Lab Assignments - 201 X C Six HepID=9ca21d320b455f2dffd7601af0f84482#10001 Part A How much mechanical energy is required each cycle to operate the refrigerator? Express your answer in joules to two significant figures. IVO ALDO a ?...
the coefficient of performance of an irreversible The coefficient of performance of a reversible refrigeration cycle is always refrigeration cycle when each operates between the same two thermal reservoirs. greater than equal to less than
4. A proposed heat pump would use Win - 30 W of power and supply QH 300 W of heat to a room at TH 30 °C. The heat pump would draw in heat from an environment at T 5 °C. a) Using the Clausius inequality, show whether this heat pump is possble or not. If possible, isitreversible or irreversible? b) Repeat part (a) using the Carnot principles.
2. The coefficient of lateral earth pressure at rest K is defined as sat K, (o'h/σ,v) where σ"n and σ,v are the effective horizontal and verti- cal normal stresses. For the soil stratum shown, Ko is determined to be 045, the saturated soil density Ysat is 18 kN/m2 and the water table is 2 m below ground surface. 2 m (a) Assuming the soil is saturated to ground surface and there is no seep- age, plot the at-rest (geostatic) σν,...
A Peltier cooler is a heat pump that can be set to either cool or heat its contents. One such cooler uses 100 W of input power whether heating or cooling. Which is greater, its coefficient of performance for cooling or its coefficient of performance for heating? netyplugintie pho/1817827m COP oing cWn COP,eating = QH / W Heat pump W. A. Cooling B. Heating in 100 J/s C. The two coefficients are the same.
Goal Solve for the performance coefficient of a refrigerator using a five- step process the includes: 1. Making a state table. 2. Making a process table. 3. Calculating the totals for Work, Heat, and Internal-Energy-Change. 4. Identifying the heat input (cold reservoir) and output (hot reservoir). 5. Calculating the performance coefficient of the refrigerator. isothermal Problem Shown in the figure to the right is a cyclic process undergone by a refrigerator. Your refrigerator shall use 8.0 moles of helium gas...
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