Determine the cop of a refrigerator

Author: gikd

August undefined, 2024

WebMay 22, 2024 · According to the above formula, the maximum achievable COP for T hot = 35 °C (308 K) and T cold = 0 °C (273 K) would be 8.8. But in reality the best systems are around 4.5. As can be seen, the COP of a heat pump system can be improved by … WebThe food compartment of a refrigerator, shown in Fig. 6-24, is maintained at 4°C by removing heat from it at a rate of 360 kJ/min. If the required power input to the refrigerator is 2 kW, determine (a) the coefficient of performance of the refrigerator and (b) the rate of heat rejection to the room that houses the refrigerator.

Solved Refrigerant-134a enters the evaporator coils …

WebThe coefficient of performance or COP (sometimes CP or CoP) of a heat pump, refrigerator or air conditioning system is a ratio of useful heating or cooling provided to work (energy) required. Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. WebME354 Thermodynamics 2 Quiz #3 - T02: Name: ID #: Problem: A commercial refrigerator with refrigerant- 134a as the working ﬂuidisusedtokeepthe refrigerated space at −30 C by rejecting its waste heat to cooling water that enters the condenser at 18 C at a rate of 0.25kg/sand leaves at 26 C.The refrigerant enters the condenser at 1.2MPa and … grady grady insurance new bern nc

Ways of calculating coefficient of performance (COP)

WebThe coefficient of performance (COP) is a measure of efficiency of the refrigerator. The COP of a domestic refrigerator is the ratio of the refrigeration capacity to the energy supplied to the compressor. It can be expressed by equation 3 (Dossat, 1978; Dincer, 2003). P Q in COP 2 1 1 4 m h h m h h (3) http://labman.phys.utk.edu/phys136core/modules/m3/refrigerators.html WebFor a refrigerator the coefficient of performance is COP = Q low / (-W). Details of the calculation: (a) COP = Q low / (-W). (-W) = Q low /COP = 120/5 J = 24 J. The work is done on the system. Ordered (electrical) energy is converted into thermal energy. (b) (-W) = 24 J = Q high - Q low . Q high = 24 J + 120 J = 144 J. Embedded Question 2 grady greene apex

Solved Refrigerant-134a enters the evaporator coils …

[Solved] Determine the COP of a vapor-compression SolutionInn

WebThis coefficient of performance (COP) calculator calculates the ratio of heating or cooling provided to work required. The most basic formula to COP is Q/W, where Q is the heat supplied to or removed from the … http://www.mhtl.uwaterloo.ca/courses/me354/tutorials/pdffiles/Winter07_quiz/q3t02_sol.pdf grady goat yoga thonotosassaWebMechanical Engineering questions and answers. Determine the COP of a refrigerator that removes heat from the food compartment at a rate of 5080 kJ/h for each kW of power it consumes. Also, determine the rate of heat rejection to the outside air. The COP of the refrigerator is The rate of heat rejection to the outside air is kJ/h. d <. chimney sydney

"WebIn a refrigeration cycle, the desired output is Q C, because the goal is to remove heat from the cold reservoir. The required input is the work input, W ref. So, COP R = Q C over W ref. Next we use the 1st Law to eliminate … " - Determine the cop of a refrigerator

Determine the cop of a refrigerator

Heat rejected by a refrigerator? - Physics Stack Exchange

Webperformance (COP): net in H HP net in L R W Q COP W Q COP,, The Reversed Carnot Cycle Reversing the Carnot cycle does reverse the directions of heat and work interactions. A refrigerator or heat pump that operates on the reversed Carnot cycle is called a Carnot refrigerator or a Carnot heat pump.

Did you know?

Web3. A household refrigerator runs one-forth of the time and removes heat from the food department at an average rate of 800 kJ/h. If the COP of the refrigerator is 2.2, determine the power that refrigerator draws when running. 4. A heat engine receives heat from a heat source at 1200 C and has a thermal efficiency of 40%. WebJan 28, 2012 · If the heat is absorbing something then what formula do I use. If you think of COP as: output/input you will avoid confusion. If it is a heat pump, the output is the heat flow to the hot reservoir. If it is a refrigerator the output is the heat flow from the cold reservoir. The input is the work done. So, for a refrigerator: COP = output/input ...

WebQuestion: a) Determine the COP of the refrigerator. b) Determine the mass flow rate [kg/hr] of the cooled water that can be produced at the prescribed temperature. c) Determine the rate of entropy generation in the compressor and the expansion valve. d) Determine the. a) Determine the COP of the refrigerator. WebAnswer (1 of 3): COP ( coeficient of performance ) is the ratio between the Q quantity of heat transferred or removed from a refrigerator system and the W the energy necessary to input into the refrigerator system to produce or remove the quantity of heat from the system. Generally W is more than...

WebApr 24, 2024 · this video will explain how to use P-H chart for calculating COP, Heat rejected by Condenser, Refrigerating effect, compressor power.=====... WebExpert Answer. Determine; (1) The mass flow rate of the refrigerant through the lower cycle. kg/s (2) The rate of heat removal from the refrigerated space. (1) kW (3) The compressor power input. kW (4) The COP of the cascade refrigerator. (1) Determine; (1) The mass flow rate of the refrigerant through the lower cycle. kg/s (2) The rate of heat ...

WebQuestion 3 (1 point) A refrigerator accepts heat at a rate of 10 kW and it consumes power (work) at a rate of 5 kW. Determine the COP of the refrigerator. O 0.50 15 kW 2.0 kW 05 kW ; Question: Question 3 (1 point) A refrigerator accepts heat at a rate of 10 kW and it consumes power (work) at a rate of 5 kW. Determine the COP of the refrigerator.

WebSep 9, 2024 · Thus, for a heat pump, the appropriate definition of the coefficient of performance is the heating effect (i.e. Q2) divided by the … grady greene apex nc obituaryWebFeb 22, 2024 · A food refrigerator is to provide a 15,000 kj/h cooling effect while rejecting 22,000 kj/h of heat. calculate the cop of this refrigerator. ... Advertisement taskmasters taskmasters Coefficient of performance or more commonly known as COP is calculated through the equation, COP = ((T₂)/(T₂ - T₁)) where T₂ is the hot temperature and T₁ ... grady great outdoorsWeba) Determine the COP of the refrigerator. b) Determine the mass flow rate [kg/hr] of the cooled water that can be produced at the prescribed temperature. c) Determine the rate of entropy generation in the compressor and the expansion valve. d) Determine the second law of efficiency of the cycle, which is the ratio the current coefficient of ... chimney tapeWebDetermine the COP of a vapor-compression refrigerator implementing the simple inverse Rankine cycle, employing R134a as refrigerant, with saturated vapor leaving the evaporator at 278 K and saturated liquid leaving the condenser at 300 K. The compressor has an isentropic efficiency of 0.87. grady greene obituary apex ncWebOct 9, 2024 · We can calculate a refrigerator coefficient of performance (COP r) in two ways: Dividing the amount of heat removed from the … chimney tarhttp://www.ecourses.ou.edu/cgi-bin/ebook.cgi?topic=th&chap_sec=05.5&page=theory grady greene facebookWebApr 13, 2024 · Regarding the average temperature of the refrigerator compartments, very adequate thermal conditions were observed; thus, the alternative refrigerants showed very similar conditions to R134a. For the coefficient of performance (COP) and considering R134a as a reference, it was observed that R513A presented the greatest reduction of … grady greene apex nc