The Effects of Inserted Cloth upon Heat Transfer of Sealed and Unsealed In the Case of a Woolen Cloth

• Published in: JOURNAL of the JAPAN RESEARCH ASSOCIATION for TEXTILE END-USES Vol. 63; no. 2; pp. 98 - 108
• Main Authors: IMAI, Motoe, KURAZUMI, Yoshihito, JOKO, Kyohei
• Format: Journal Article
• Language: Japanese
• Published: The Japan Research Association for Textile End-Uses 25.02.2022
• Subjects: boundary layer; heat dissipation; heat transfer coefficient; micro gap; sealed air layer; unsealed air layer
• ISSN: 0037-2072; 1884-6599
• DOI: 10.11419/senshoshi.63.2_98

To investigate the influence of the heat transfer of the air layer in the micro gap between skin and clothing in heat transfer while wearing clothing, sealed and unsealed air layers of various widths (≦10.0 mm)with a woolen cloth inserted, were placed into the vertical heat transfer measuring unit, attached to the heat transfer measuring device. The sealed and the unsealed air layers were undergoing heat transfer due to the flow (fluctuation) of air. There was heat transfer to the exterior space due to the flow of air in the unsealed air layer. The sealed air layer had higher heat retention than the unsealed air layer. In the sealed air gap, the total heat transfer coefficient of the air layer with the cloth inserted was smaller than that of the air layer without the cloth inserted, and the heat retention was high. In the unsealed air layer also, inserting a cloth improved heat retention.