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explain the differences in the working of a heat pump when the outdoor temperature changes contrast the heating and the cooling modes of heat pumps describe heat pumps, their use, and factors affecting their use advocate the more widespread use of heat pumps
explain the differences in the working of a heat pump when the out-door temperature changes contrast the heating and the cooling modes of heat pumps describe heat pumps, their use, and {actors affecting their use advocate the more widespread use of heat pumps
reciprocating hydraulic turbine vane
Reciprocating Centrifugal Rotary Gear
gear nonpositive displacement positive displacement rotary
heating is least essential electricity rates are lowest its compressor runs the fastest outdoor temperatures hold steady
（1） only （1）and （2） （1）, （2） and （3） （2）and （3）
variable stroke pumps multistage pumps positive displacement pumps triple-ported pumps
Hydraulic pumps Valve Hydraulic cylinders Hydraulic motors
measure accurately the flow rate of the refrigerant-mass at that point compress and heat the refrigerant vapor bring about the evaporation and cooling of refrigerant exchange heat between the refrigerant and the air at that point
carefully qualifying the meaning o{ that principle pointing out a factual error in the statement that gives rise to this question supplying additional relevant facts denying the relevance of that principle to heat pumps.
cause for regret sign of premature defeatism welcome challenge focus for an educational campaign
Reciprocating pumps Rotary pumps Centrifugal pumps Gear pumps
cause for regret sign of premature defeatism welcome challenge focus for an educational campaign
Centrifugal Reciprocating Gear Rotary
variable stroke pumps multistage pumps positive displacement pumps triple-ported pumps
（1） only （1） and （2） （1）, （2） and （3） （2） and （3）
Variable volumes can be obtained with gear pumps only by variation of the pump drivespeed A radial piston pump houses sliding pistons in a stationary cylinder block throughwhich passes a rotating pintle or ported shaft The amount of fluid displaced per revolution of an axial piston rotary pump is dependenton the angle formed between the cylinder block and valve plate All of the above
The high discharge pressure of the rotary pumps permits a larger volume of fluid perunit time than the reciprocating pump Rotary pumps are capable of pumping more fluid than reciprocating pumps of the sameweight Rotary pumps occupy only one-half the space of reciprocating pumps Rotary pumps eliminate discharge slippage of the pumped liquid, while this does nothold true for a reciprocating pump
explain the differences in the working of a heat pump when the outdoor temperature changes contrast the heating and the cooling modes of heat pumps describe heat pumps, their use, and factors affecting their use advocate the more widespread use of heat pumps
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