- heat gain and reduced efficiency of cooling systems
- condensation of water on surfaces and potential corrosion problems
- pipes in cooling systems should always be insulated.
The insulation thickness of chilled water, refrigerant and brine systems should not be less than indicated below.
|System||Operation Temperature||Pipe Size (inches)|
|< 1"||1 1/4" - 2"||2 1/2" - 4"||5" - 6"||> 8"|
|(oF)||(oC)||Insulation Thickness (inches)|
|Chilled Water||40 - 55||4 - 12||0.5||0.75||1.0||1.0||1.0|
|Refrigerant||< 40||< 4||1.0||1.5||1.5||1.5||1.5|
|Brine||< 40||< 4||1.0||1.5||1.5||1.5||1.5|
- 1 inch = 25.4 mm
Insulation of a cold system should be made with micro-cellular cross-linked polyethylene foam with low water vapor diffusion.
Heat transfer and heat loss from buildings and technical applications - heat transfer coefficients and insulation methods to reduce energy consumption.
Performance and efficiency terminology related to heat pumps and air condition systems.
Sizing cooling water pipe lines - maximum allowable flow, velocity and pressure drops.
Temperature limits for commonly used insulation materials.