A heat engine operates using the Carnot cycle. In one cycle it performs 475 J of work and dumps 1250 J of heat into a cold temperature reservoir. The hot temperature reservoir it absorbs heat from has a temperature of TH = 100 o Calculate the efficiency e of the heat engine and the temperature TC of the cold temperature reservoir.

A heat engine operates using the Carnot cycle. In one cycle it performs 475 J of work and dumps 1250 J of heat into a cold temperature reservoir. The hot temperature reservoir it absorbs heat from has a temperature of TH = 100 o Calculate the efficiency e of the heat engine and the temperature TC of the cold temperature reservoir.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 12RQ: Refrigerators currently being manufactured in the United States are using______as their refrigerant.

See similar textbooks

Similar questions

Þetermine the maximum possible efficiency of the heat engine shown below. Also find the maximum possible work output in kW and hp as well as the waste heat in kw. If this ideal heat engine is operating with an ideal gas and the outlet pressure is 100 kPa, what is the pressure of the high temperature reservoir? T= 600-C Q = 900 kJ/s Engine Tz = 50°C %3!
Two Carnot engines are hooked up in series so that the waste thermal energy at constant tempera- ture TM for the first engine is used as the heat source for the second engine. The high temperature reservoir for engine 1 is at TH = 327 C. The low temperature reservoir for engine 2 is at TL = 27 C. TL < TM < TH. For what value of TM in C will the combined engine produce the greatest total work output, wi + w2? TH 1 W1 TM 2 W2 TL Figure 2: Two Carnot engines operate in series.
A gasoline truck engine takes in 10,000 J of heat and delivers 2,000 J of mechanical work per cycle. . What other machines utilize the concept of heat engine in its operation? Give at least 3 examples.
An inventor just invented a kind of heat engine that could operate at a maximum temperature of 1000K and minimum temperature of 300K. This heat engine is used to drive a heat pump which extracts heat from the reservoir at 300 K. Its capacity is operating at a rate twice that at which the engine rejects heat to it. If the efficiency of the engine is 40% of the maximum possible and the COP of the heat pump is 50% of the maximum possible, what is the temperature of the reservoir to which the heat pump rejects heat? What is the rate of heat rejection from the heat pump if the rate of heat supply to the engine is 50 kW?
A cyclic heat engine operates between a source and sink that are respectively attemperatures of 1000 0C and 50 0C. Draw the diagram, calculate the efficiency of the heatengine and the rate of heat rejection per kW net output of the engine.
A reversed heat engine absorbs 250 kJ of heat from a low temperature region and has a mechanical input of 100kJ. What would be the heat transferred to the high temperatur region? Also evaluate the coefficient of performance of the reversed engine when working a refrigerator and as a heat pump.
A heat engine has a thermal efficiency of 70%. During each cycle the engine does 400J of work. What is the magnitude of waste heat rejected to the low temp reservoir?
2. Between 300K and 600K is the operating temperature of a pair of heat pumps connected in series. The efficiency of the second heat pump is three times that of the first. Find the input work for the first and second heat pumps if the second heat pump absorbs 20kW of heat and the heat release in the first heat pump is the same.
A heat engine delivers 624 J of work with an efficiency of 34%. Calculate the amount of heat (in joules) released by the engine.
Consider a heat engine rate of heat production at 85 MW and at the same time reject heat to a sink at 40 MW. From the formula file which formula number is applicable to determine the power output and thermal efficiency of the engine.
Q4/ A particular power plant operates with a heat source reservoir at 350 °C and a heat sink reservoir at 30 °C. It has a thermal efficiency equal to 55% of the Carnot engine therma' efficiency for the same temperatures. 1. What is the thermal efficiency of the plant? 2. To what temperature must the heat source reservoir be raised to increase the thermal efficiency of the plant to 35%?
In a refrigerator the power rating impressed on the compressor is 1.2 kW. The circulating wire in evaporator is 5 kW and the cooling water took away 10 kW from condenser coil. The operating temperatures range is 18ºC and 0ºC and their corresponding latent heats are 170 kJ/kg and 230 kJ/kg and the difference between theliquid energy is 35 kJ/kg. Find the actual COP of the system (2) relative COP, assuming the vapor is just dry and saturated at the end of the compression.