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Why does the head pressure rise when the evaporator has an excess load?
Wiki User
∙ 10y ago
the system capacity is max out
Wiki User
∙ 10y ago
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When the evaporator experiences a load increase what happens to the suction pressure?
when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase but we use some valves to fix this problem , for example thermostatic expansion valve it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
When an evaporator experiences a heat load increase what happens to the suction pressure?
when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase but we use some valves to fix this problem , for example thermostatic expansion valve it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
When the load on the evaporator increases the TXV?
when the load increases the amount of vapor increases , so the pressure inside the evaporator increases and as we r in the wet region inside the evaporator the pressure and the temp. are proportional so the temp. too will increase but we use some valves to fix this problem , for example thermostatic expansion valve it helps add more m dot of the refrigerant so the amount of heat from the load will be distributed over a larger mass so the pressure inside the evaporator will remain the same
Meaning of overload?
To load or fill to excess; to load too heavily., An excessive load; the excess beyond a proper load.
The meaning of overload?
To load or fill to excess; to load too heavily., An excessive load; the excess beyond a proper load.
Porters wear turbans when they have to carry heavy load on their heads?
By doing this they increase the area of contact of load with their head , so the pressure on their head is reduced.So,they feel less weight on their head.
Dry expansion evaporator?
In dray expansion evaporator, the liquid refrigerant is generally fed by an expansion valve. the expansion valve controls the rate of flow of refrigerant to the evaporator. In the evaporator the liquid refrigerant is vaporized and superheated by the time it reaches to the end of evaporator. At inlet of the evaporator, the refrigerant is predominantly in the liquid form with a small amount of vapor formed as a result of flashing at the expansion valve. the liquid refrigerant passes through the evaporator, more and more refrigerant is vaporized by the load. according to the load, the liquid will come into evaporator and vaporize and reaches to superheat at the end of the evaporator. The inside of the evaporator is far from dry but wetted with liquid so named as dry expansion evaporator.
Why do porter place round piece of cloth above their head when they have to carry heavy loads?
by doing this they increase the area of contact of load with their head , so the pressure on their head is reduced.
Typical evaporator temperature in an air conditioning system is?
40-45 depending on load
Does compressor work more efficiently with an increased head pressure?
It depends on other conditions too. There is a net suction head, which is the pressure from which the compressor is drawing the gas. An increase here will often improve the compressor's efficiency. There is also a net discharge head, which is the pressure the compressor is trying to maintain. An increase here will often decrease the compressor's efficiency. There is an efficiency curve for all compressors, and they are all different based on their design, it is dependent on the differential pressure (NDH - NSH) and load (air flow in SCFM, typically) of the compressor, at a certain load the efficiency peaks then drops as the load increases.
Why potters place a round piece of cloth on their head when they carry heavy loads?
by doing so they increase the area of contanct of the force of the load with their head.thus the pressure on their head is decreased
What is meant by pressure rating of pump?
Pressure rating means maximum pressure at which pump can operate safely.Pump delivers a pressure according to load. If load is more , it'll deliver more pressure. At some point load is large enough to cause damage to parts of the pump. That pressure is rated pressure. For example if pump rating is 10 bar, it can asustain safely the load that creates 10 bar pressure.
