What is meant by condenser pressure?
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What is meant by condenser pressure?
The condenser provides a vacuum that maximizes the energy extracted from the steam, resulting in a significant increase in network and thermal efficiency. But also this parameter (condenser pressure) has its engineering limits: Decreasing the turbine exhaust pressure decreases the vapor quality (or dryness fraction).
What controls the condenser pressure?
The flow of condensate from the condenser is controlled by varying the flooded area. Increasing the flooded area (by reducing flow) increases the column pressure (less surface area for condensation). Pressure can also be controlled by adjusting the flow of coolant to the condenser ( see Figure below).
What’s the causes of high condensing pressure in refrigeration system?
One common cause of high discharge pressure is the cooling medium (air or water) flowing across the condenser: either there is not enough or the temperature of the cooling medium is too high. This is normally easy to identify with a simple visual inspection of the condenser.
What happens to pressure in a condenser?
In a condenser, the refrigerant flow velocity is reduced as the refrigerant condenses, because the liquid phase has a much smaller specific volume than the gas phase. Hence, the major part of the pressure drop of the condenser is induced in the desuperheating operation, when the refrigerant is still a gas.
Does a condenser increase pressure?
Evaporating temperature and evaporating pressure increase as the pressure drop increases. It causes the decrease of refrigerant density, refrigerant mass flow rate, and refrigeration effect. The enthalpy difference across condenser and compressor, however, increase with the increasing pressure drop.
What is the purpose of condenser?
The purpose of the condenser is to receive the high-pressure gas from the compressor and convert this gas to a liquid. It does it by heat transfer, or the principle that heat will always move from a warmer to a cooler substance.
Why is condenser pressure low?
Low condensing pressure: Because the evaporator and compressor are being starved of refrigerant, the condenser will also be starved. Starving the condenser will reduce the heat load on the condenser because it will not see as much refrigerant to reject any heat.
What issues could cause excessively high condenser head pressure?
Causes of high head pressure
- Overcharging of the refrigerant in the system.
- Operating the system at high range than the specified limit.
- Malfunctioning of the condenser fan motor.
- The system is charged with the impurities of non condensing gases.
- The condenser coil is not cleaned well.
- Refrigeration device plugged.
What is condenser pressure and evaporator pressure?
Condensing pressure: The pressure at which the refrigerant is phase changing from a vapor to a liquid. Evaporating pressure: The pressure at which the refrigerant is phase changing from a liquid to a vapor.
Is pressure constant in condenser?
Yes, pressure changes at evaporation or condensing. But it is nevertheless constant throughout the pipe.
How much pressure is in a condenser?
The condenser pressures considered range from 400 to 3000 kPa. The COP decreases with increasing condenser pressure for all three heat pump systems.
Does pressure drop in condenser?
The pressure drop in the condenser causes the decrease of evaporating pressure and temperature. It also causes the decrease of refrigerant mass flow rate and the refrigeration effect.
What is condenser in refrigeration?
The condenser removes heat from the hot refrigerant vapor gas vapor until it condenses into a saturated liquid state, a.k.a. condensation. After condensing, the refrigerant is a high-pressure, low-temperature liquid, at which point it’s routed to the loop’s expansion device.
What are two purposes of the condenser?
Can TXV cause high head pressure?
Some of these, such as a bad TXV or clogs in the refrigeration system are cited as the most common causes of high compressor head pressure.
Does pressure drop in a condenser?
What causes low pressure in condenser?
With not as much heat to accept and thus reject from the compressor, the condenser will be at a lower temperature. This lower temperature will cause a lower pressure in the condenser because of the pressure-temperature relationship at saturation.
