What is the purpose of economizer?

What is the purpose of economizer?

A common application of economizers in steam power plants is to capture the waste heat from boiler stack gases (flue gas) and transfer it to the boiler feedwater. This raises the temperature of the boiler feedwater, lowering the needed energy input, in turn reducing the firing rates needed for the rated boiler output.

How do you find the chiller approach?

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 and returns to the cooling tower.

What is screw type chiller?

Screw compressor chiller. Screw compressors are used for both water cooled and air cooled chillers. With water cooled type the compressor is on top of the chiller and with air cooled type the compressors is under the chiller. Indoor water cooled chillers will often be insulated whereas air cooled may not be.

What is evaporator approach in chiller?

Evaporator approach is the difference between evaporating temperature measured at the well in the evaporator, and leaving chilled water temperature. Condenser approach is the difference between liquid refrigerant temperature as measured on the liquid line, and leaving condenser water temperature.

What is the normal evaporator approach temperature?


What is a good Delta T in HVAC?

On the cooling side, the ideal Delta T range varies depending on who you ask, but a good rule of thumb is between 16F and 22F. On the heating side, the ideal Delta T range varies by system, so check the data plate on the furnace to see the temperature rise minimum and maximum (it’s usually a 30-degree spread).

Which chemical is used for descaling in condenser?

Descaling agents are typically acidic compounds such as hydrochloric acid that react with the calcium carbonate and magnesium carbonate compounds present in the scale, producing carbon dioxide gas and a soluble salt.

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