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If the condensing pressure is 260 psig and the condensing outlet temperature is 108 degrees. what is the sub cooling in the condenser?
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∙ 9y ago
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∙ 9y ago
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AC sub cooling reading?
How do you measure Sub-Cooling for a R-22 AC system SUB-COOLING IS THE THE "HEAT BELOW SATURATION". THE SUB-COOLING LEAVING THE CONDENSER IS CALCULATED BY TAKING THE (ACTUAL)CONDENSING TEMPERATURE AND THEN SUBTRACTING (MINUS)THE LIQUID REFRIGERANT TEMPERATURE (USE THE CHART)LEAVING THE CONDENSER.=THE SUBCOOLING. NORMAL SUBCOOLING AT THE CONDENSER OUTLET SHOULD BE 10*F. THIS WILL ENSURE THAT LIQUID WILL NOT FLASH INTO VAPOR BEFORE IT GETS TO THE EXPANSION VALVE, SHOULD THERE BE A SLIGHT INCREASE IN TEMPERATURE OR A SLIGHT DECREASE IN PRESSURE DUE TO A PRESSURE DROP. SUB COOLING INCREASES CAPACITY & PREVENTS FLASH GAS IN THE LIQUID LINE AHEAD OF THE EXPANSION VALVE. I HOPE THIS IS VERY CLEAR, AND HELPS U FIGURE OUT HOW TO MEASURE IT. TODD S. FISCHER, PRESIDENT OF THE TAMPABAY CHAPTER OF RSES THE REFRIGERATION SERVICE ENGINEERS SOCIETY- BECOME A MEMBER SOON!!
What causes Back pressure on cooling system?
Condenser Backpressure is the difference between the Atmospheric Pressure and the Vacuum Reading of the Condenser, that is: Backpressure = Atm. Pressure - Condenser Vacuum Pressure Reading Usually, the condenser vacuum pressure is read by a manometer installed at the condenser. The atmospheric pressure is read using a barometer
How do you move natural gas?
Natural gas can be moved by pipeline (common in North America) or by condensing it with high pressure and cooling to make a liquid then shipping it in pressure vessels (common in shipping gas from Nigeria to Europe).
What is it called when the air temperature drops because of it rising?
Adiabatic cooling is cooling as a result of reduced air pressure(i.e. rising air)
Methods in liquifying gases?
Atmospheric gases can be liquefied by (i) increasing atmospheric pressure ; and (ii) decreasing temperature. By increasing pressure particles of the gas get compressed. Decreasing temperature reduces kinetic energy.
If an R 12 refrigeration system has its air cooled condensing unit on a 100F roof and the condenser outlet temperature refrigerant is 115F with how much sub cooling is the condenser operating?
15
What is reason for low vacuum in surface condenser?
Reasons for low vacuum: 1. Low gland sealing pressure 2. Condenser tubes choked 3. Condenser cooling water temperature high 4. Leakage in condenser tubes 5. Less cooling water flow
AC sub cooling reading?
How do you measure Sub-Cooling for a R-22 AC system SUB-COOLING IS THE THE "HEAT BELOW SATURATION". THE SUB-COOLING LEAVING THE CONDENSER IS CALCULATED BY TAKING THE (ACTUAL)CONDENSING TEMPERATURE AND THEN SUBTRACTING (MINUS)THE LIQUID REFRIGERANT TEMPERATURE (USE THE CHART)LEAVING THE CONDENSER.=THE SUBCOOLING. NORMAL SUBCOOLING AT THE CONDENSER OUTLET SHOULD BE 10*F. THIS WILL ENSURE THAT LIQUID WILL NOT FLASH INTO VAPOR BEFORE IT GETS TO THE EXPANSION VALVE, SHOULD THERE BE A SLIGHT INCREASE IN TEMPERATURE OR A SLIGHT DECREASE IN PRESSURE DUE TO A PRESSURE DROP. SUB COOLING INCREASES CAPACITY & PREVENTS FLASH GAS IN THE LIQUID LINE AHEAD OF THE EXPANSION VALVE. I HOPE THIS IS VERY CLEAR, AND HELPS U FIGURE OUT HOW TO MEASURE IT. TODD S. FISCHER, PRESIDENT OF THE TAMPABAY CHAPTER OF RSES THE REFRIGERATION SERVICE ENGINEERS SOCIETY- BECOME A MEMBER SOON!!
What causes Back pressure on cooling system?
Condenser Backpressure is the difference between the Atmospheric Pressure and the Vacuum Reading of the Condenser, that is: Backpressure = Atm. Pressure - Condenser Vacuum Pressure Reading Usually, the condenser vacuum pressure is read by a manometer installed at the condenser. The atmospheric pressure is read using a barometer
Why the cooling water enters the condenser at the lower opening and leaves at the upper opening?
Because if water enters from the lowest point, the condenser will always be filled with cold water to ensure efficient cooling. The water should always flow into a condenser at its lowest point and exit from its highest point. This avoids trapping air in the water jacket.
What is a refrigeration condenser?
found on the high side of the system ( meaning high pressure side ) it acts in the same way the radiator in your car does, its job is to dispel the heat energy from the refrigeration system by way of heat transfer over the coils surface -there are many different types of coils but they all do the exact same thing. on a more technical level -----super heated vapour is forced into the top of the condensing coil circuit after it has been compressed by the heat pump ( the compressor ) creating a high pressure, ......so as the heat escapes from the condenser the refrigerant reaches a stage known as sub cooling , the gas is reaching its saturated discharge temperature ( the point at which no more temperature can be rejected from the gas / system ) and so this high pressure allows the vapour to change to a liquid by the time it is pushed out of the bottom of the condensing coil.
Why used hogger and ejector in steam turbine?
A steam turbine condenser equipped with ejectors is usually fitted with two ejectors. The larger of the two is called the hogger and the smaller the huffer. Steam turbines are designed for efficiency and thus attempt to extract as much energy from the steam passing thru as is physically possible. Energy is extracted as both temperature and pressure decrease. The lower the temperature and pressure at the steam turbine's exhaust the more energy can be extracted from the steam. For this reason it is desirable for the steam turbine condenser (the exhaust) to be at the lowest temperature and pressure possible. The hogger, or hogging jet, is a large steam powered ejector that causes the steam condenser to operate under a near perfect vacuum whilst the steam turbine is in the start-up phase. In steady state operation the cooling effect of the condenser cooling water of the steam causes the condenser to operate under a nearly self sustained vacuum. The hogger is necessary in the start-up phase to prevent steam from condensing to water in the final stages of the turbine before the steam flow and cooling effect of the condenser can establish vacuum. The huffer or huffing jet runs continuously whilst the turbine is operating to remove any non-condensable gasses (i.e. air) that might leak into the condenser. It is nearly impossible to perfectly seal a condenser and turbine from air-in leakage. It should be noted that modern, large steam turbines do not employ steam ejectors to establish and maintain condenser vacuum. Modern designs utilize motor driven mechanical vacuum pumps.
What is the purpose of the fins on the condenser?
cooling
How will cooling towers inprove the efficiency of power stations?
The efficiency of the Rankine cycle depends on extracting as much energy from the steam flow through the turbine as possible, and to do this you need to have as low a vacuum in the condenser as possible. The lower the temperature of the cooling water flow through the condenser, the lower the vacuum that can be achieved. Cooling towers are often the best solution, though plants on a large lake or the ocean can use direct cooling supplies from that source and this may give better efficiency. It all depends on the cooling water temperature that can be achieved.
Funcation of condenser?
The function of the condenser is to condense a substance from its gaseous to its liquid state, typically by cooling it.
How do you move natural gas?
Natural gas can be moved by pipeline (common in North America) or by condensing it with high pressure and cooling to make a liquid then shipping it in pressure vessels (common in shipping gas from Nigeria to Europe).
Why hotwell level is maintained in condenser?
High hotwell level will get the cooling water tubes of condenser submerged in the condensate hence cooling efect will be reduced consequentaly vacuum will drop. Low hotwell level will lead to low suction pressure of Condensate Extraction Pump hence it may lead to cavitation.
