A reversed Carnot engine (refrigerator) has a coefficient of operation (COP) 2.79. The temperature of the cold reservoir is - 29°C. The input power used by this machine is 1235 kJ/h. a) Calculate the heat absorbed from the refrigerator. This engine is converted into a heat engine (Carnot engine); and the temperature of the hot reservoir and cold reservoir is maintained the same. b) Calculate the thermal efficiency of this heat engine.
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- A Carnot heat engine operates with an efficiency η=0.5 between a hot reservoir at temperature T1 and a cold reservoir at temperature T2=300 K. Calculate the temperature T1 of the hot reservoir. Select one: a.T1=150.0 b.T1=300.0 c.T1=900.0 d.T1=600.0Calculate thermal efficiency (e) of a heat engine which extracts 2000 J ofenergy from a hot reservoir and transfer 1000 J to a cold reservoir, during oncecycle?What is the best coefficient of performance possible for such a heat pump, if it has a hot reservoir temperature of 45.0°C and a cold reservoir temperature of -15.0°C?
- Calculate the maximum theoretical efficiency of a heat engine that operates with the hot steam temperature at 390 °C and the cool steam temperature at 230°C. Please give your answer in two decimals, NOT percentage. For example, efficiency of 0.62. Your Answer: AnswerA heat engine operates at 48% of its maximum theoretical (Carnot) efficiency. If the temperature of the hot and cold reservoirs are 385 °C and 70 °C, respectively, what is the efficiency of the engine?A Carnot engine produces 58.639 hp of power while operating between temperature limits of 1.229°F and 81°F. Determine the efficiency of the engine in %. Answer in 3 decimal places.
- The efficiency of a Carnot engine is 29.3%. What is the temperature of the cold reservoir if the temperature of the hot reservoir is 425 K?9) A heat pump is used to move heat from 10°C air outside, to a 22 °C air inside. The practical coefficient of performance of this pump is 4.1, and it uses 12000 J of electric energy. a) Find the energy this system adds to the house. b) Find the theoretical (maximum) coefficient of performance for this system. 5A Carnot engine works at high temperature 710°F with the efficiency of 40.2%. If the efficiency of the engine is 65.8% and the low temperature kept constant, what is the high temperature in °F?
- A Styrofoam cup holding 142 g of hot water at 1.00 ✕ 102°C cools to room temperature, 21.0°C. What is the change in entropy of the room? (Neglect the specific heat of the cup and any change in temperature of the room. The specific heat of water is 4,186 J/(kg · °C).)__________ J/KDuring each cycle a reversible engine absorbs 2500 J of heat from high-temperature reservoir and performs 2200 J of work. i) What is the efficiency of this engine? ii) How much heat is exhausted to the low-temperature reservoir during each cycle?QUESTION 4 In a single cycle, heat engine extracts 8.00 kcal of heat from a hot reservoir and exhausts 5.00 kcal of heat int a cold reservoir. What is the efficiency of this engine? а. 67.5% b. 77.5% C. 57.5% d. 47.5% е. 37.5%