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Nov
Say you have a chiller running at 60 load and you have cond water in 85 and leaving 91 if you measured the saturated cond temp at 93 you would have 2 degrees approach. Generally the condenser approach for a water-cooled chiller will be in the range of 0 to 4 degrees.
By definition approach is the difference between the leaving water and the saturated refrigerant temperature.
What is condenser approach. A condenser approach is a difference between liquid refrigerant temperature as measured on the liquid line and leaving condenser water temperature. Generally the condenser approach for a water-cooled chiller will be in the range of 0 to 4 degrees. When condenser approach temperature is within the prescribed range it indicates clean condenser tubes and an efficient centrifugal chiller.
Conversely when condenser approach temperature is on. Approach is simply how many degrees warmer the liquid line leaving the condenser is than the air entering the condenser. The approach method does not require gauges connected to the system but it does require a good temperature reading on the liquid line and suction line Shown using the Testo 115i clamp and 605i thermo-hygrometer smart probes.
Condenser approach is heat transfer the water to gas of condenser efficiency is good less then below 2 F the system is working good. By definition approach is the difference between the leaving water and the saturated refrigerant temperature. Say you have a chiller running at 60 load and you have cond water in 85 and leaving 91 if you measured the saturated cond temp at 93 you would have 2 degrees approach.
Condenser approach is the difference between liquid refrigerant temperature as measured on the liquid line and leaving condenser water temperature. Normal condenser approach is 0 to 3 degrees. If approach is 4 or more its an indication your water cooled chiller has fouled tubes.
Różnica temperatur czynników na wylocie skraplaczaparownika. A condenser is a piece of industrial equipment that acts as a heat exchanger to convert a vapor to a liquid. It does this by reducing the vapors temperature via thermodynamic contact with an external fluid of lower temperature.
Often the gas to be treated is steam and the external fluid is water. Condensers are prone to corrosion due to their. The main steam condenser MC system is designed to condense and deaerate the exhaust steam from the main turbine and provide a heat sink for the turbine bypass system.
The exhausted steam from the LP turbines is condensed by passing over. Condenser approach temperature is simply defined as the difference between the condenser liquid refrigerant temperature and the outlet condenser water temperature. High chiller approach temperatures usually mean reduced heat transfer increased energy consumption and a reduction in refrigeration capacity of the chiller unit.
In chiller lingo this measurement is called the approach. There are two different approach temps that I look at on a chiller. Condenser approach cond sat temp lvg cond water temp Evaporator approach lvg water temp evap sat temp Approach values should range in 0 3F 0K 165K given that your flows are correct.
An optimal approach temperature OAT control strategy is proposed for resetting the condensing water temperature hourly so to maximize the performance of. Range and Approach If you are still getting your bearings with cooling tower design terminology you may wonder what the terms approach and range mean. Approach is the temperature of the water leaving the cooling tower in this case 85F nominal minus the ambient web bulb temperature 78F wet bulb or 7F.
High Condenser Approach in Water Cooled Centrifugal Chiller imok2 Mechanical 11 Jul 06 0154 Higher approach temperatures are prime indicators that heat transfer efficiency is decreasing due to such factors as minerals scale mud algae and other impurities which increase thermal resistance and degrade the overall performance of the heat exchanger. If the condenser approach Condenser Approach Saturated Refrigerant Condensing Temperature Leaving Condenser Water Temperature is too high the capacity of the chiller will be negatively affected as the compressor may not be able to deliver as much capacity or must work much harder to achieve the same capacity as at the design approach temperatures as the. Approach TO TWB.
Some Key Cooling Tower Concepts. When in doubt use a 7 F Minimum Approach. Using colder condenser water reduces the chiller KW by 1 to 15 per F.
So the colder the water the better the KW efficiency. So set the low limit on the TO setpoint based on what the chillers can handle. To calculate the condenser approach temperature first obtain the temperature of the Freon refrigerant condensing temperature found on the lower shell side of the condenser heat exchanger.
Next read the temperature of the cooling water that leaves the condenser. Vacuum in a condenser is found to be 7085 mm Hg. Inlet and outlet temperatures of cooling water are 28C and 36C respectively.
Find the thermal efficiency of the condenser. Vacuum in condenser 7085 mm Hg. Pressure Barometer pressure Vac.
Approach is due to fouling of condenser tubes as these are open loops and they depend on the quality of the condenser water. Performance of chiller heat exchangers evaporator and condenser r A Primary chiller water pump Secondary chiller water pump D e-c o u p l e l i ne Building load at 600 TR C h i ll e r 2 O F 350 TR of 600 TR 1440 GPM 540F 440F 960 GPM.