Most electricity and natural gas consumption is used for

Suppose you must remove an average of 3.9*108J of thermal energy per day to keep your house cool during the summer. Part A If you upgrade from an old air conditioner with a COP of 2.3 to a new air conditioner with a COP of 6.

In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by a a) - absorber, generator and liquid pump. b) - absorber and generator. c) - liquid pump. d) - generator.

I have a plot plan with an angle of 35 degrees on the main lot, how will this affect the construction of the basement

Liquid flows at steady state at a rate of 2 lb/s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. The liquid specific enthalpy at the inlet is 40.09 Btu/lb and at the exit is 40.94 Btu/lb.

A square-thread power screw has a major diameter of 32 mm and a pitch of 4 mm with single threads, and it is used to raise a load putting a force of 6.5 kN on the screw. The coefficient of friction for both the collar and screw is. 08.

A (n) 78-hp compressor in a facility that operates at full load for 2500 h a year is powered by an electric motor that has an efficiency of 93 percent. If the unit cost of electricity is $0.

What design advantages can you identify in the location of the controller

A dam 75 ft wide, with a nominal flow rate of 260 ft3/s, is to be studied with a scale model 3 ft wide, using Froude scaling as the most important similarity parameter.

The primary heat transfer mechanism that quickly warms my hand if I hold it directly above a campfire is: a) - Radiation b) - Inductance c) - Convection d) - Conduction

A long thin copper rod (K = 377 W/m K) 10 mm in diameter is exposed to an environment at 22 oC. The base temperature of the rod is maintained at 150 oC. The heat transfer coefficient between the rod and the environment is 11 W/m2 K.