Chapter 5, Problem 5.100EP

An electric power plant operating on the Carnot cycle puts heat into a river with a water temperature of (15 °C), what must be the maximum temperature that the working material puts forward in the plant to be efficient (40%), and if it is required to produce a capacity (20MW), what is the quantity rejected and Additive heat per unit time.

What is the maximum efficiency of heat engine working between 1500K and 300K temperature. If such engine generates 320 kW of work after extracting 700 kJ/s heat from 1500K source, find the second law efficiency.

See photo below

The refrigeration system of a food production firm is run using the Reversed Carnot Cycle. The temperature of the hot refrigerant supply in the system should be 52°C, while the temperature of the sink should be -14°C. Its capacity is projected to be at least 24 tons. It's important not to disregard losses. Find and Show unit analysis and conversion: a. COP and COP of Heat Pump b. Heat rejected from the system in kW c. Network in, Hp and Energy Efficiency Ratio

5. A heat engine release heat into the cold reservoir at 500 K with a carnot efficiency of 25 %. What exhaust temperature will increase the carnot efficiency to 60 %?

/

The thermal efficiency of a Carnot heat engine is 30%. If the engine is reversed in operation to work as a heat pump with same operating conditions then what will be the COP for heat pump?

Attempt only if you are 100% Sure ,It seems 6.5 is the right answer. Show work within 20Minutes for thumb up

In the open-circuit steam plant, boiler feed water at atmospheric pressure 1 bar and 35oC is pumped into an oil-fired boiler which produces dry-saturated steam at 10 bar. This steam enters a steam turbine and is expanded isentropic ally to atmospheric pressure and freely discharged into the atmosphere. Find The thermal efficiency of the plant. The work ratio The specific steam consumption