A food refrigerator is to provide a 15,000-kJ/h cooling effect while rejecting 22100 kJ/h of heat. Calculate the COP of this refrigerator. (Round the final answer to one decimal place.) Reservoir Он R 15,000 kJ/h Reservoir The COP of the refrigerator is
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- In a refrigeration cycle, the refrigerant gains heat in the evaporator and in thesuction line. In a certain refrigeration system, R-134a gains 67.8 Britishthermal units per pound (Btu/lb) in the evaporator. It then gains 2.5 Btu/lb inthe suction line. Find in Btu/lb the total heat gained by the R-134a.A heat pump is used to extract heat from the outside atmosphere to heat the inside of a building. On a day when the outside air temperature is Tc°C, the heat pump is operating to a COP of 3.7, maintaining the inside temperature of the building at Th°C. If the building is losing heat at the rate of 53,709 kJ/hour in these conditions, determine how much power (kW) must be supplied to a heat pump? Keep two decimal placesCompletely solve and box the final answers. A Carnot heat engine with a thermal efficiency of 70% is supplied with heat at a rate of 800 kJ/min. If it is coupled to a Carnot heat pump to deliver 1800 kJ/min per minute of heating, determine the COP and temperature outside the house if it is maintained at 24°C
- The thermal effiency of a general heat engine is 35 percent, and it produces 60 hp. At what rate is heat transferred to this engine, in kJ/s?II. Problem Solving: 1. A Carnot engine requires 35kJ/kg from the hot source. The engine produces 15 kW of power and temperature of the sinks is 26°C. What is the temperature of the source in °C?In a given process, a heat engine requires 2500J of energy and exhausts 1200J of heat. What is its efficiency?
- A heat engine must provide 1000 Watts of power. Assuming it has an efficiency of 0.32, how much heat must be supplied to the engine, in Watts?As shown in Figure 2, Carnot Heat Engine (HE) working between temperatures T1 = 150 °C and T2= 4 °C. The engine drives Carnot Refrigerator (R) that works between T3= 52 ° C and T4= -4 "C. What is the ratio of Q3/Q1?1. In an analysis, a heat engine based on the Carnot cycle operating between 1000 0C and 300 0C. The heat rejected from this engine to the sink was at a rate of 800 kJ/min. Determine the thermal efficiency (in %) and power output (in kW) of the engin 2.You found out that the power output of your dream car is the same as the sum of each digits of your student number (in kW) with a percentage thermal efficiency the same as the first four digit of your student number divided by 100. The calorific value of the fuel available has a calorific value of 40 000 kJ/kg. Assuming a constant power output from the car, calculate the heat transfer rate (in kW) and the fuel consumption rate (in kg/h)
- A heat engine has a thermal efficiency of 40 percent and it produces 600 kJ of work. What is the heat input to the heat engine, in MJ? Report your answer to one decimal place.An otto engine has a clearance volume of 7%. It produces 300 kilowatts ofpower. What is the amount of heat rejected in kW?A refrigerator is connected to a generator powered by a fuel with a calorific value of 35000 kJ/kg and a density of 0.85 g/cm3 . The inside temperature of the refrigerator is 0°C, and the outside temperature is 20°C. a. How much work is required to freeze 500 g of water? ΔfreezingH° = 6.02 kJ mol– 1 ) b. How much internal energy change occurs during the process? c. Since the generator consumes 5 L of fuel per hour, calculate the thermal efficiency of this engine.