Determine the cop of a refrigerator

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August undefined, 2024

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. 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 …

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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 ... 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 , … five letter word starting with aa

Solved Refrigerant-134a enters the compressor of a Chegg.com

Web2296, 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 … 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... WebIt includes measurements of the thermal insulation of a typical refrigerator cabinet (1.21 W/K for the freezer, 0.88 W/K for the refrigerated compartment). From Table 3 of that publication, I find a COP of about 1.7 - suggesting that for our example 1.7*25 W = 42 W of heat is extracted, and 42W+25W = 67 W is rejected five letter word starting w

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Heat Rejection by a Refrigerator The food compartment of a refrigerator ...

http://www.mhtl.uwaterloo.ca/courses/me354/tutorials/pdffiles/Winter07_quiz/q3t02_sol.pdf 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 ... can i return skechers to any storeWebQuestion. 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. five letter word starting with ad

"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. " - Determine the cop of a refrigerator

Determine the cop of a refrigerator

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

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. WebApr 24, 2024 · this video will explain how to use P-H chart for calculating COP, Heat rejected by Condenser, Refrigerating effect, compressor power.=====...

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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 …

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 … WebSince the ratio of heat removed to work input is defined as the COP of a refrigerator, this corresponds to a COP of 1.8. ... Using this equation with COP = 1.8 and T 0 = 25°C, we determine T = −81.3°C. This is the temperature a heat reservoir would have if a Carnot refrigerator with a COP of 1.8 operated between this reservoir and another ...

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. 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 ...

WebExpert Answer. Refrigerant-134a enters the evaporator coils placed at the back of the freezer section of a household refrigerator at 100 kPa with a quality of 20 percent and leaves at 100 kPa and-26°C. If the compressor …

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. can i return something from amazonWebFor 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 can i return sunglass hut to macy\u0027sWebQuestion 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. five letter word starting with aliWebIn 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 … five letter word starting whohttp://www.ecourses.ou.edu/cgi-bin/ebook.cgi?topic=th&chap_sec=05.5&page=theory five letter word starting with aloWebQuestion: 1) A refrigerator uses refrigerant-134a as the working fluid and operates on an ideal vapor-compression refrigeration cycle between 0.12 and 0.7 MPa. The mass flow rate of the refrigerant is 0.05 kg/s. Determine: a) the rate of heat removal from the refrigerated space (kw), b)the power input to the compressor (kw), c) the rate of heat rejection to the five letter word starting with aeWebApr 5, 2024 · A refrigerator using R-134a rnaintains the ternperature of its compartment at -10°C while ambient temperature A 35°C. Make reasonable assumptions and a) Determine how the pressure levels should change if we replace the working fluid with propane, Orb) Recommend whether propane or R-134a should be used, considering the COP. five letter word starting with ado