The Influence of Piping Thermal Insulation on Indoor Climate and Exergy Consumption Related to Hot Water Floor Heating in Tokyo. (November 2015)

• Record Type: Journal Article
• Authors: Takahashi, I.; Nemoto, S.
• Is Part Of: Energy procedia. Volume 78(2015)
• Page Start: 2632
• Page End: 2638
• Publication Date: 2015-11
• Subjects: Hot water floor heating -- Piping -- Thermal insulation -- Heat loss -- Exegy; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2015.11.329
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: This paper describes results of a numerical simulation and an exergy analysis focusing upon the influence of piping thermal insulation on floor heating in Tokyo. In a case, pipe length is 1m indoor and 4m outdoor, diminishing linear thermal transmittance from 6.21 W/mK to 2.91 W/mK can raise the seasonal minimum of a room air temperature at am 6:00 from 10.2 °C to 14.5 °C. The ratio of thermal exergy flowing into the floor inlet to the exergy input of a boiler increases from 2.90% to 9.50%. These are much smaller than the case of energy and also its change larger than it.