A heat engine, 325 kJ the heat 1000 K taking from an energy reservoir and 125 kJ waste heat 400 K It throws it into an energy reservoir.Meanwhile 200 kJ releases an energy Is the cycle that this heat engine runs on Reversible? Is it irreversible? Is it impossible? Why is that? b)An inventor -10°C with internal temperature 25°C Coefficient of activity between room temperature 8.5 a cooling with claims to run his machine. Could this claim be true? Why is that?

A heat engine, 325 kJ the heat 1000 K taking from an energy reservoir and 125 kJ waste heat 400 K It throws it into an energy reservoir.Meanwhile 200 kJ releases an energy Is the cycle that this heat engine runs on Reversible? Is it irreversible? Is it impossible? Why is that? b)An inventor -10°C with internal temperature 25°C Coefficient of activity between room temperature 8.5 a cooling with claims to run his machine. Could this claim be true? Why is that?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A heat pump is used to heat a house. The heat loss of the house at a time when the outside temperature is A ° C is B kJ / h. The interior temperature of the house is C ° C. If the coefficient of action (COPIP) of the heat pumpis D under these conditions ,a) The power consumed by the heat pump [kW],b) The heat transferred from the cold outside air to the heat pump [kJ / h]c) If the heat pump is considered to work reversibly,calculate the COPIP.
A heat engine that receives heat from a furnace at 1200°C and rejects waste heat to a river at 20°C has a thermal efficiency of 40 percent. Determine the second law efficiency of this power plant. P. S. Hi. please show me the full solution so i can review it thank you very much
In an area, heat is supplied at a heat engine with a temperature of 700°C, while waste heat is disposed at 60°C. Then, a generator is connected together with a heat pump to the heat engine to check the amount of power being produced. If the heat pump will warm the area at 25°C, while its outside temperature is at 10°C. The area now loses 80,000 kJ/hr of heat. And, 20% of the heat engine’s power output will go to the heat pump. How much needs to be burned by the heat engine to maintain the temperature in the area? Assuming a carnot heat engine and heat pump.
A reversible engine receives heat from a source at 800 ° C some heat goes to a sink at a temperature of 25 ° C. If the motor receives a heat flow of 1200 kJ / min find: a) The thermal efficiency of the motor and b) The working power output of the motor are in kW. Ans: a)η=72.2% b)Ẇ=14.44kW
With a 1 kW pump, the energy leakage per unit time is 0.6 kW for a 1 ℃ temperature difference between a house to be heated and the outside environment. Coefficient of performance of the heat pump used to keep this house at a constant temperature of 20 ℃; If it is up to the theoretical heat pump performance coefficient; What is the minimum outdoor temperature ℃ for this heat pump to meet its needs and be used?
A commercial refrigerator is to cool eggplants from 26 to 5 °C at a rate of 380 kg/h. The power input to the refrigerator is 4.5 kW. Determine (a) the rate of cooling, (b) the COP, (c) the exergy of the heat transferred from the low-temperature medium, and (d) the second-law efficiency and the exergy destruction for the cycle. The specific heat of eggplant above freezing is 3.92 kJ/kg.°C.
A 45 MW thermal power plant, which receives 80 MW of heat from a thermal source of 440 ℃ terk, leaves the heat to the 18 river next to it. What will be the real thermal efficiency of a thermal power plant?
Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. A region is to be cooled to a temperature of 277 K using a heat powered Carnot refrigerator. The heat that must be removed is 15,000 W. The heat rejected from the refrigerator is to a heat reservoir at TL. The heat input to this device is from a reservoir at TH. This is a Carnot model of an absorber refrigeration system. In it a Carnot heat engine operates between reservoirs at TH and TL. The work output from this Carnot heat engine is the input to a Carnot refrigerator that operates between TI and…
Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. A region is to be cooled to a temperature of 277 K using a heat powered Carnot refrigerator. The heat that must be removed is 15,000 W. The heat rejected from the refrigerator is to a heat reservoir at TL. The heat input to this device is from a reservoir at TH. This is a Carnot model of an absorber refrigeration system. In it a Carnot heat engine operates between reservoirs at TH and TL. The work output from this Carnot heat engine is the input to a Carnot refrigerator that operates between TI and…
. Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. For this information answer the following questions: a) Calculate the Carnot Efficiency of a heat engine that operates between TH and TL. b) A room is maintained at a constant temperature of 20 C and has a heat loss of 20,000 W. Consider this room for a period of 3 hours. The surroundings are at a temperature of TI. In one option the room is heated using resistive heaters that are operated with electricity. b1)Determine the electrical energy input to these heaters. b2)Determine the efficiency of…
Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. Efficiency of the Carnot engine is 38%. For this information answer the following questions: 1) A room is maintained at a constant temperature of 20 C and has a heat loss of 20,000 W. Consider this room for a period of 3 hours. The surroundings are at a temperature of TI. In one option the room is heated using resistive heaters that are operated with electricity. For the same conditions described in part 1 above, consider using a Carnot heat pump to supply the heat to the room. The low temperature…
Consider three reservoirs that are TH = 473.2 K, TL = 293.2 K and TI = 277.2 K. A Carnot heat engine can be reversed and used as either a heat pump or a refrigerator. In the case of a heat pump the heat flow to the higher temperature reservoir is the desired output and it is used to heat a room or building. In the case of the refrigerator the desired energy flow is the heat in from a region to be cooled. For the heat pump or refrigerator, the work input is provided by electricity. Efficiency of the Carnot engine is 38%. For this information answer the following questions: A room is maintained at a constant temperature of 20 C and has a heat loss of 20,000 W. Consider this room for a period of 3 hours. The surroundings are at a temperature of TI. In one option the room is heated using resistive heaters that are operated with electricity. a)Determine the electrical energy input to these heaters. b)Determine the efficiency of this heating system. c)Determine the entropy production…