1 What is reheat Why is it required even with VAV sometimes

1\\ What is reheat? Why is it required even with VAV sometimes?

2\\ What is a waterside economizer?

3\\ What is free cooling?

Solution

>> Solution 1.

Reheat :- The process of using the hot exhaust to burn extra fuel in a jet engine and produce extra power.

>> Solution 2.

A common form of refrigeration economizer is a \"walk-in cooler economizer\" or \"outside air refrigeration system\". In such a system outside air that is cooler than the air inside a refrigerated space is brought into that space and the same amount of warmer inside air is ducted outside. The resulting cooling supplements or replaces the operation of a compressor-based refrigeration system. If the air inside a cooled space is only about 5°F warmer than the outside air that replaces it (that is, the T>5°F) this cooling effect is accomplished more efficiently than the same amount of cooling resulting from a compressor based system. If the outside air is not cold enough to overcome the refrigeration load of the space the compressor system will need to also operate, or the temperature inside the space will rise.

>> Solution 3.

Free cooling is an economic method of using low external air temperatures to assist in chilling water, which can then be used for industrial process, or air conditioning systems in green data centers.