Two engines have cylinders which are geometrically the same in size and shape. The cylinders of engine A are surrounded with a normal water jacket filled with a water-ethylene glycol solution. The cylinders of engine B are insulated, making this an adiabatic engine. Other than temperatures, the engines are operated with the same steady-state conditions (as much as possible). (a) Which engine has higher volumetric efficiency? Why? (b) Which engine has higher thermal efficiency? Why? (c) Which engine has hotter exhaust? Why? (d) Which engine would be more difficult to lubricate? Why? (e) Which engine would be a better SI engine? Why?

Thermodynamics Water is being cooledd in a closed container while being stirred by a paddle wheel. During thisprocess, 25 kJ of heat is taken away from the water, and 15 kJ of heat is added to the water. Thepaddle-wheel work amounts to 5 N.m. Determine the final energy of the system if its initialenergy is 10 kJ. (Sketch the system boundaries)

While steam power cycles provide much of the electricity that powers the United States, not all the thermal energy used to generate the steam comes from burning fossil fuels. Below is a high-level schematic of a concentrated solar power (CSP) plant that uses a sodium-/potassium-nitrate molten salt to absorb solar thermal energy which is then transferred to steam to run a superheat Rankine cycle. Parabolic mirrors (receivers) concentrate solar energy onto pipes carrying the molten salt. As the molten salt flows through these tubes, it absorbs the reflected solar energy and eventually transfers this energy to steam in a heat exchanger (boiler). For your ensuing analysis, you may assume that the boiler and condenser operate isobarically. Molten salt or oil Receiver Pump wwwwww wimm Turbine Heat exchanger Electric generator Condenser Warm water Feedwater pump Pump Makeup water Cooling tower \/\/I\/10 Viviv j "i Cooled water The net power output of the steam cycle is 40 MW. If the pressure…

The coal combustion in the furnace of steam power plant produces p=44.03 mega-Watts (MW) of heating power to produce steam. 0.1*p mega-Watts are lost from the factory infrastructure (pipes, vanes, etc). The depleted steam is cooled by a water cooling system that expels 0.45*p of waste heat to the environment. Calculate the net mechanical power output. Present your answer in mega-Watts (MW).