Determine the cop of a refrigerator

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August undefined, 2024

WebMechanical 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 <. 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 a) Determine the COP of the refrigerator. b) Chegg.com

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 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 many ounces in a fifth of scotch

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

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) 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. 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. how many ounces in a fishbowl glass

Solved Question 3 (1 point) A refrigerator accepts heat at a - Chegg

COP refrigerator vs COP Heat Pump Physics Forums

http://www.learningaboutelectronics.com/Articles/Coefficient-of-performance-calculator.php 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%. how many ounces in a flat whiteWebFor 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 how many ounces in a dry cup

"WebAccording 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 ). " - Determine the cop of a refrigerator

Determine the cop of a refrigerator

PERFORMANCE ANALYSIS OF A DOMESTIC 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 … 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 ...

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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 ... WebThe SEER is defined as the Btu/hr of heat transferred per watt of work energy input. The Btu is the British thermal unit and is equivalent to 778 ft-lbf of work (1 W = 3.4122 Btu/hr). An EER of 10 yields a COP of 2.9. Refrigeration systems …

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. 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 ...

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 WebMar 31, 2024 · The Coefficient of Performance (COP) is defined by the ratio of heat dissipation and electrical power intake. It is the parameter by which the air conditioning unit’s performance is evaluated. It shows how effective heating and cooling systems are, following points show the characteristics of COP,

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

WebQuestion: 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 how big is the biggest cave how big is the biggest butterfly in the worldWeb2296, 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 … how many ounces in a flaskWebIn 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 … how many ounces in a full glass of waterWebMar 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 , … how big is the biggest crabWebA household refrigerator runs one-fourth of the time and removes heat from the food compartment at an average rate of 800 kJ/n. If the COP of the refrigerator is 2.3, determine the power the refrigerator draws when running. 300 Wh COP Refrigerator The power the refrigerator draws when running is KW how many ounces in a fun size mWebDetermine 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. how many ounces in a fifth of rum