Across commercial applications and in different climate zones, the combination of ambient air temperature, humidity and pipes’ surface temperature can have a big influence on the efficiency and economics of chilled water piping systems. As warm, moist air inside a commercial building or production facility migrates toward the cooler surface of pipes, moisture can collect on the surface of unprotected piping or insulation. If chilled water pipes are uninsulated, under-insulated, or, if the insulation is damaged, the system is vulnerable to corrosion risk, reduced performance and potentially, mold or mildew formation. And as degraded insulation causes a chilled water system to work harder, increased energy consumption can be another unwelcome consequence.
A properly specified insulation system for chilled water pipes includes insulation installed at the appropriate thickness. Additionally, the insulation must be properly installed on the system. The ASHRAE Standard 90.1 and the International Energy Conservation Code (IECC) requirements for pipe insulation specify the minimum standard for energy efficiency in commercial enclosures. However, the minimum pipe insulation thicknesses listed in ASHRAE 90.1 are not intended to prevent condensation on piping.