Chapter 7, Problem 7.1DOEP

describe how the Internal Combustion Engines (ICEs) (applicable to a particular purpose such as generators, vehicle, domestic device etc.) was improved in terms of sustainability in consideration to energy use and pollution effects. 1.Conclusions: Findings based on your current knowledge of thermodynamics should be expressed. Suggestion and implication on possible saving or future projection(s)

Determine the specific exergy of saturated water vapor at 137 °C, where To = 313K, Po = 101.3kPa. Assume the velocity and elevation is zero with reference to the environment. You must use following tables to solve this problem. (answer to 2 decimal) Saturated water temperature table Sat Liq. Temp., Sat Liq. Sat Liq. Sat Liq. vf uf hf sf °C m3/kg kJ/kg kJ/kg kJ/kg.K 30 0.001004 125.73 125.74 0.4368 35 0.001006 146.63 146.64 0.5051 40 0.001008 167.53 167.53 0.5724 45 0.00101 188.43 188.44 0.6386 Saturated water temperature table Temp., Sat. Vap. Sat. Vap. Sat. Vap. Sat. Vap. hg kJ/kg vg ug sg °C m3/kg kJ/kg kJ/kg.K 125 0.7508 2534.5 2713.5 7.0745 126 0.7358 2535.5 2714.8 7.0649 127 0.7208 2536.5 2716.1 7.0553 128 0.7058 2537.5 2717.4 7.0457 129 0.6908 2538.5 2718.7 7.0361 130 0.6758 2539.5 2720.0 7.0265 131 0.6608 2540.5 2721.4 7.0169 132 0.6458 2541.4 2722.7 7.0073 133 0.6308 2542.4 2724.0 6.9977 134 0.6158 2543.4 2725.3 6.9881 6.9785 135 0.6008 2544.4 2726.6 136 0.5858 2545.4 2727.9…

= The owner of a propose steam power plant received bids from two fuel supplier. The first supplier offers coal whose ultimate analysis is: C = 71.5%, H = 5%, 0 = 7%, S = 3.6%, N = 1.3%, A = 8.2%, and M 3.4%. The other supplier offers natural gas whose HHV is 52.2MJ/kg and whose volumetric analysis is: 60% CH4, 30%C2H6, and 10%CO. Excess air for both cases is 20%. Other data for the power plant are: net output = 100MW, heat added at the boiler = 90% of energy chargeable, specific enthalpy in kJ/kg: turbine inlet = 3582.3, turbine outlet = 2251.881, pump inlet = 289.23, boiler inlet = 304.534. Atmospheric air temperature is 35C. Find possible steam consumption of this propose plant in kg/s.

Thermodynamics. 1) For a closed system, as the exergy reference environment temperature ___________, the exergy destruction rate decreases 2) Which of the following statements does not describe the exergy reference environment? It is large in extent. It has a uniform temperature. It is incompressible. It has a uniform pressure.   3) Air within a piston–cylinder assembly undergoes an expansion process from an initial volume of 0.5 m3 to 1 m3. The dead state pressure is 100 kPa. If the work associated with the process is 60 kJ, determine the exergy transfer accompanying work, in kJ.

FAST ANSWERS WILL BE GIVEN UPVOTE.

Your neighbor lives in a 2500-square-foot (about 250 m2) older house heated by natural gas. The current gas heater was installed in the early 1980s and has an efficiency (called the Annual Fuel Utilization Efficiency rating, or AFUE) of 65 percent. It is time to replace the furnace, and the neighbor is trying to decide between a conventional furnace that has an efficiency of 80 percent and costs $1500 and a highefficiency furnace that has an efficiency of 95 percent and costs $2500. Your neighbor offered to pay you $100 if you help him make the right decision. Considering the weather data, typical heating loads, and the price of natural gas in your area, make a recommendation to your neighbor based on a convincing economic analysis.

Kindly answer all the questions being asked. I will rate "like/upvote" your post if you answer all of the questions; if not, then i will "unlike/downvote." Please show complete solution and clear explanation. Choose from the choices for the correct answer. Thank you.

7. What kind of resources does nuclear energy require? Is it worth the effort and the investment to acquire nuclearenergy?8. Exactly how important is nuclear power and nuclear waste?

Describe the Carnot Principles and briefly discuss the importance.