%0 Journal Article
%T Study of the insulation effect of freezing apparatuses<br>
%A JingWu Huang
%A JianPing Wang
%A Heng Wang
%A <br>
%J 寒旱区科学
%D 2012
%I 
%X In-situ tests and numerical manipulations were conducted for comparison of superior/inferior quality of casing-tube-vacuumized insulation and polyurethane insulation of freezing apparatuses in relation to non-uniform cold distribution in the multi-coil freezing layout and the contradiction between large-coil diameter layout of the freezing holes and stability of the headframe base. Tests show that: (1) under current technology, vacuumized insulation is of short duration due to lack of appropriate applied vacuum; (2) after the freezing pipe is insulated with polyurethane, the temperature gradient is less than no insulation, and the temperature difference between insulated and non-insulated apparatuses is stable as the freezing period increases. Finally, it is pointed out that polyurethane insulation is quite efficient in present technical freezing construction.
%K freezing pipe
%K insulation effect
%K polyurethane
%K energy conservation<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=179362CF6F8AE4E2D95268111832CC42&aid=93C895218548304EB0B4710D33EE75B0&yid=99E9153A83D4CB11&vid=E158A972A605785F&iid=CA4FD0336C81A37A&sid=094CD0DBA7C50357&eid=2AEAADAC8D5D5E2F&journal_id=1674-3822&journal_name=寒旱区科学&referenced_num=0&reference_num=0