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A heat pump has a coefficient of performance that is 50% of the theoretical maximum. It maintains a house at 20°C, which leaks energy of 0.6 kW per degree temperature difference to the ambient. For a maximum of 1.0 kW power input find the minimum outside temperature for which the heat pump is a sufficient heat source.
consider a small ammonia absorption refrigeration cycle that is powered by solar energy and is to be used as an air
determine the amount of heat necessary to raise the temperature of 1 kg of aluminum from 30oc to 100oc.
Infrastructure Difficulty in siting new plants Cost and efficiency losses (5-8%) in transmission Power quality and dependability issues Higher Efficiency Efficiency is reduced by fuel processing Fuel is relatively inexpensive and plentiful (now) L..
Determine the molecular weight of a poly(ethylene-propylene) with a degree of polymerization of 25,000 given that 20% of the mers (by number) are ethylene and 80% are propylenel.
a continuous beam abc is fully restrained at point a and restrained at point c in all senses except that it may move in
air initially at a dry-bulb temperature of 45oc and relative humidity of 10 is adiabatically humidified to 60 relative
a flange is used for instrument connection for a system with a design temperature of 316degc 600degf and a design
for a short period of time the frictional driving force acting on the wheels of the 2.4-mg van is fd 600t2 n where t
nitrogen is compressed in a polytropic process with n 1.2 from 120 kpa and 10oc to 800 kpa in a piston-cylinder
Determine the tensions developed in wires , and and the angle required for equilibrium of the 30-lb cylinder E and the 60-lb cylinder F.
express the magnification ratio ms1s2 of the projections of the two objects o1 and o2 depicted in figure p3.2 in terms
a first class lever in static equilibrium has a 50lb resistance force and 15lb effort force. the levers effort force is
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