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Home arrow Resources arrow ASHRAE Glossary
Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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blowdown

1. discharge of water from a steam boiler or open recirculating system that contains high total dissolved solids.  The addition of makeup water will reduce the concentration of dissolved solids to minimize their precipitation.

2. in pressure-relief devices, the difference between actuation pressure of a pressure-relief valve, and reseating pressure, ex­pressed as a percentage of set pressure, or in pressure units 

 




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