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In a winter season when outside temperature is –1oC, the inside of house is to be...

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Mechanical Engineering

In a winter season when outside temperature is –1oC, the insideof house is to be maintained at 25oC. Estimate the minimum powerrequired to run the heat pump of maintaining the temperature.Assume heating load as 125 MJ/h.

What would be maximum efficiency of engine that

     can be had between the temperatures of1150oC

      and 27oC ?

1.A heat engine is supplied with 278 kJ/s of heat at a constantfixed temperature of 283°C and the heat rejection takes place at5°C. The following results were reported :

(i) 208 kJ/s are rejected, (ii) 139 kJ/s are rejected, (ii) 70kJ/s are rejected.

    Classify which of the results report areversible cycle or irreversible cycle or impossible results.

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