Wouldn't there also be an energy cost to a circulating system? Every piece of pipe will pass heat to the refrigerated space. There is a cost to that. Then the refrigeration system needs to run to remove that heat and blow it off to the atmosphere. Or are you intending on intercepting some of that waste heat, and use it to heat the sprinkler pipe? Sometimes the waste heat from the refer system is used to heat soil at footings to prevent frost heave. Sounds more complicated than using a dry system with a good air dryer.
bv ----- Original Message ----- From: "Nicky Marshall" < nicky @ protechdesign .co. nz > To: sprinklerforum @lists. firesprinkler .org Sent: Thursday, June 13, 2013 3:02:24 AM Subject: Freeze prevention Is anybody aware of approved systems for freeze prevention of sprinkler pipework that involves circulating water within pipework? We are aware of dry systems, anti-freeze systems, heat tracing. A dry system requires additional water due to area increase - a tank would be needed. Anti freeze has not got very good press lately and approved products are expensive. Heat tracing does not seem like a very energy efficient system. There are circulating systems for domestic applications and internet searches show several patents for such systems for sprinklers, but I cannot find actual products. Thanks Nicky Marshall Protech Design New Zealand _______________________________________________ Sprinklerforum mailing list Sprinklerforum @lists. firesprinkler .org http ://lists. firesprinkler .org/ listinfo . cgi / sprinklerforum - firesprinkler .org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
