Indoor non-uniform environmental characteristics of local convection heating and its background radiation field correction

Author:

Dong Binyan12,Wang Dengjia12ORCID,Song Cong1,Su Ling12

Affiliation:

1. State Key Laboratory of Green Building in Western China, Xi’an University of Architecture and Technology, China

2. School of Building Equipment Science and Engineering, Xi’an University of Architecture and Technology, China

Abstract

Insufficient partial heating based on the actual thermal demand of people or spaces becomes a revolutionary approach to reducing energy consumption. However, current research on local heating is case-specific and lacks standardized and unified guidelines for describing the formation of non-uniform indoor environments. In this paper, the local temperature imbalance rate and Part-Air Diffusion Performance Index (P-ADPI) parameters are proposed for multidimensional evaluation of indoor non-uniform environment characteristics. On the basis of the characteristic parameters, a unified indoor environment characterization partition was performed in the study. The results indicate that an increase in air supply temperature and air supply velocity could enlarge the characteristic core area and transition area. The intervention of background radiation conditions could intensify the inhomogeneity of the indoor environment, but it would have a minimal impact on the classification of the environment. The background radiation condition was incorporated into the characteristic boundary function model as a correction factor, and the correction factors for determining the background radiation temperature, position and the area fall within the ranges of 0.97–1.44, 0.82–1.01 and 0.98–1.10. This study has provided the groundwork for future studies on the local convection heating and the creation of a non-uniform indoor environment.

Funder

The Science Foundation for Outstanding Youth of Shaanxi Province

The research was supported by the National Natural Science Foundation of China

Publisher

SAGE Publications

Subject

Public Health, Environmental and Occupational Health,Building and Construction

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