Evaluating the cold protective performance (CPP) of an electrically heated garment (EHG) and a chemically heated garment (CHG) in cold environments
| Autor: | Wenfang Song, Dandan Lai, Faming Wang |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Model control
Air velocity Materials science Polymers and Plastics business.industry General Chemical Engineering Thermal manikin Thermal comfort General Chemistry 030204 cardiovascular system & hematology 03 medical and health sciences 0302 clinical medicine Thermal insulation 030212 general & internal medicine Composite material business Heating efficiency |
| Zdroj: | Fibers and Polymers. 16:2689-2697 |
| ISSN: | 1875-0052 1229-9197 |
| DOI: | 10.1007/s12221-015-5409-4 |
| Popis: | This study investigated the cold protective performance (CPP) of two types of heated garments using a Newton manikin operated in constant temperature mode (CT) and thermoregulatory model control (TMC) mode. The effect of two levels of air velocity (i.e., 0.4±0.1 m/s and 1.0±0.1 m/s) on the CPP was discussed. Five scenarios were chosen, the traditional cold protective ensemble (CON), the electrically heated garment (EHG), the non-heated electrically heated garment (EHGCON, heating was turned off), the chemically heated garment (CHG) and the non-heated chemically heated garment (CHGCON) (completely oxidized body warmers were used). All experiments were performed at ta=2.0±0.3 oC and RH=80±5 %. Results demonstrated that both EHG and CHG could provide improved cold protection compared to the nonheated garments, evidenced by the significantly higher thermal insulation in EHG and CHG at both two air velocities (p 0.05). It was thus anticipated that both two heated garments could improve human wear thermal comfort in cold environments. |
| Databáze: | OpenAIRE |
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