a ten story building is to be constructed at a site where the water table is close to the ground surface .the foundation of the building will be supported on 30cm diametre pipe piles. the bottom of the pile cap will be at a depth of 1.0m below ground level. the soil investigation at the site and laboratory tests have provided the saturated unit weight, the shear strength values under undrained conditions, the corrected spt values, and the soil profile of the soil to a depth of 40m.

Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.