5. consider a 200 kw fuel cell combined heat and power (chp) plant that is fueled with natural gas that has a lower heating value of 48.3 mj/kg. based on the lower heating value of the fuel, the power plant has a heat rate of 9000 btu/kwhe. the heat rate accounts only the production of electricity from the fuel cell and not the delivery of heat. the capacity factor of the plant is 60%. the fuel cell is a combined heat and power (chp) plant which produces 300,000 btu/h of heat energy at the rated power of 200 kw. what is the lower heating value combined heat and power efficiency of the plant (%)?

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

If the thermal strain developed in polyimide film during deposition is given as 0.0044. assume room temperature is kept at 17.3 c, and thermal coefficient of expansion for the film and the substrate are 54 x 10^-6c^-1 and 3.3 x 10^-6c^-1respectively. calculate the deposition temperature.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?