Determine the cop of a refrigerator

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August undefined, 2024

WebDetermine 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. WebFeb 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 ...

Drop-In Replacement of R134a in a Household Refrigerator with …

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 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) how to reset brother toner message

11.8: Heat Engines and Refrigerators - Physics LibreTexts

WebTranscribed Image Text: A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor- compression refrigeration cycle except for the compression process as shown in Figure Q1. The refrigerant enters the evaporator at 120 kPa with a quality of 34 percent and leaves the compressor at 70°C. If the compressor consumes … http://labman.phys.utk.edu/phys136core/modules/m3/refrigerators.html#:~:text=For%20a%20refrigerator%20the%20coefficient%20of%20performance%20is,low%20%2FCOP%20%3D%20120%2F5%20J%20%3D%2024%20J. WebDetermine the refrigeration capacity (QL) in kW 13.0 kW c.) Determine the coefficient of performance (COP) for this refrigerator COP = 9.23 d.) Determine the coefficient of performance (COP) for the most effective refrigerator that could be designed to operate between these 2 temperature regions COP = 10.5 north carolina ratified the constitution on

What is the difference between COP of refrigerator and COP of …

Solved a) Determine the COP of the refrigerator. b) Chegg.com

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 WebThe coefficient of performance (COP) of reversible or irreversible refrigerator or heat pump is given by. COP R = 1/ ( (Q H /Q L )-1) COP HP = 1/ (1- (Q L /Q H )) where. Q H = the amount of heat rejected to the. high-temperature reservoir. Q L = the amount of heat received from the. low-temperature reservoir. how to reset bt mini connectorsWebAccording 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 reducing the temperature difference (T hot – T cold ). north carolina raw milk laws

"WebMar 17, 2015 · Coefficient Of Performance (COP) is the ratio of "Coldness" produced to the "Heat" or " Work" supplied. In the case of vapour compression system, it is the mechanical or electrical work , … " - Determine the cop of a refrigerator

Determine the cop of a refrigerator

A food refrigerator is to provide a 15,000 kj/h cooling effect while ...

WebFeb 15, 2024 · Here’s the equation to calculate COP: COP (heating) = Q (hot)/W =Q (cold) +W/ W For ideal heat pumps that have no irreversibility’s and losses, the equation can be: COP (heating) = T (hot) / T (hot) – T (cold) Different Types Of Heat Pumps Explained Geothermal Heat Pumps 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.

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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. 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.

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 … http://labman.phys.utk.edu/phys136core/modules/m3/refrigerators.html

WebQuestion. A household refrigerator that has a power input of 450 W and a COP of 1.5 is to cool 5 large watermelons, 10 kg each, to 8 ^\circ {} ∘ C. If the watermelons are initially at 28 ^\circ {} ∘ C, determine how long it will take for the refrigerator to cool them. The watermelons can be treated as water whose specific heat is 4.2 kJ/kgK. 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 …

Weba) 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 ...

http://www.ecourses.ou.edu/cgi-bin/ebook.cgi?topic=th&chap_sec=05.5&page=theory north carolina reWeb2296, Page 4 International Refrigeration and Air Conditioning Conference at Purdue, July 12-15, 2010 where ûp cab=K ffm ff 2=K fzm fz 2 is the pressure drop in both the frozen- and fresh-food compartments (see Fig. 3), and ûp fan is the pressure head provided by the fan, which was correlated as follows (Waltrich, 2008), Δ = 3 i 0 i p fan e i m fan (13) The … north carolina rattlesnake biteWebApr 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 … north carolina rdh licenseWebApr 24, 2024 · this video will explain how to use P-H chart for calculating COP, Heat rejected by Condenser, Refrigerating effect, compressor power.=====... how to reset brushes in procreateWebJun 13, 2024 · The COP is defined as the ratio of the desired heat transfer to the work required to make the transfer. What is considered to be the "desired heat transfer" depends on whether you are looking at it as a heat pump or as an air conditioner/refrigerator. C O P H P = Q H W C O P A C = Q L W and since W = Q H − Q L C O P H P = Q H Q H − Q L north carolina rattlesnake typesWebWe have already understood that COP is the ratio of refrigerating effect to the power input. It is basically the amount of refrigerating effect per unit power input. An air conditioner has a COP value 5 means; 1 kW of power input is required to extract 5 … how to reset brushes in photoshop 2022http://www.mhtl.uwaterloo.ca/courses/me354/tutorials/pdffiles/Winter07_quiz/q3t02_sol.pdf how to reset bt tv box