Diesel cycle releases 1750 J/mol ofheat. The pressure and temperature at the begin-ning of the compression step are 1 bar and 50°C,and the pressure at the beginning of the expansionis 5 bar. The working fluid is an ideal gas for whichcP= 7R/2 andcV= 5R/2. (a) What is the tem-perature at the end of the adiabatic expansion? (b)What is the heat absorbed by the engine? (c) Whatis the compression ratio? (d) What is the work doneduring the compression step?

3. For the gas system power illustrated in Figure 3 (with the air-standard analysis assumptions), calculate thermal efficiency, back work ratio, and Weycle -10 P₁ = 100 kPa T₁ = 350 K Oia Heat exchanger Heat exchanger Qout T₁ - 1500 K Turbine Wycle 1 T₁ - 1500 K p= 1000 kPa p= 100 kPa T₁ = 350 K Figure 3. Operating condition of a gas power system cycle (The P-V and T-S diagram)

In a cyclic comprising of air compressor and expansion, workdone by a prism during the compression stroke is 9.2KJ and the heat rejected to the surrounding is 50KJ. During the expansion stroke workdone by air on the prism is 8.4KJ. a) Determine the quality of heat transferred to or from the system. Tullow oil has discovered a large volume of crude deposit at Cape-3-Point along the western coast of Ghana after years of intensive exploration. In the Company’s bid to start exploration, Green Ghana an environmental protection NGO took Tullow to court to prevent the Company from embarking on the said project citing numerous environmental concerns. b) As an energy and sustainability expert, what do you think are the side effects of the project and their remedies? A cooling water pump is operating at a speed of 1800rpm. Its flow rate is 1800L/minutes at a head of 14.4m and the power of the pump is 45kw. c) Determine the power required if the pump speed is increased…

The Diesel cycle has a compression ratio of 9.40. The cutoff ratio is 3.20. When you use the cold air standard assumptions the cycle efficiency is? When k = 1.4.