Use the map of ohio that follows to find the average wind speed for columbus, ohio (5.5 m/s). a wind turbine located at byers mazda subaru near i 270 on the north part of columbus can generate 150,000kwh in a year. it has a 69 ft. radius. (watch units.) assume it turns continuously in a year. what is the efficiency of the turbine? show your calculations. assuming a single household uses about 50 kwh/day, how many households can be powered by this turbine?

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?

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Determine the stoichiometric and actual air-fuel ratios and the mole flue gas composition for combustion with 15% excess air for raw indiana, pennsylvania raw coal.