Experimental Investigation of Mean Radiant Temperature Trends for a Ground Source Heat Pump-Integrated Radiant Wall and Ceiling Heating System

Author:

Dogan Ahmet1ORCID,Kayaci Nurullah2ORCID,Kanbur Baris Burak3,Demir Hakan2

Affiliation:

1. Department of Mechanical Engineering, Erzincan Binali Yıldırım University, Erzincan 24002, Türkiye

2. Department of Mechanical Engineering, Yildiz Technical University, Istanbul 34220, Türkiye

3. Department of Civil and Mechanical Engineering, Technical University of Denmark, 2800 Lyngby, Denmark

Abstract

Mean radiant temperature (MRT) is one of the six primary factors that determine thermal comfort in a given thermal environment. In this study, the average radiant temperature was determined using a calculation method based on the surrounding surface temperatures and view factors. The present study specifically investigated the use of calculated radiant temperature, compared to measured radiant temperature, for predicting the mean vote (PMV) and percentage of dissatisfied (PPD) comfort parameters. The method was validated by the experimental measurements via the black sphere thermometer at five different reference points in a test room, including radiant panels on the ceiling and walls. By using global thermometer measurements, the proposed approach achieved a high degree of compatibility and an accuracy of 0.17 °C, which was the difference between calculated and measured values. The results demonstrated the reliability of the procedure using view factors and surrounding surface temperatures to calculate the radiant temperature in the designated test room; here, a straightforward method for evaluating the thermal conditions of an office room and determining the optimal location of an air temperature sensor in PMV-controlled radiant systems was also proposed. This study contributes to the increasing field of research on thermal comfort and offers knowledge that is beneficial for the design and optimization of indoor environments.

Funder

Yildiz Technical University under the BAP program

Yildiz Technical University

Publisher

MDPI AG

Subject

Building and Construction,Civil and Structural Engineering,Architecture

Reference50 articles.

1. International Energy Agency (2020). Statistics Report Key World Energy Statistics 2020, IEA.

2. Ministry of Energy and Natural Resources of Türkiye (2022). Türkiye National Energy Plan 2022.

3. Policy Brief Energy Efficiency Trends in Buildings in the EU (2023, September 10). In Most European Countries, Buildings Account for the Largest Share of Final Consumption. Available online: https://www.odyssee-mure.eu/publications/policy-brief/buildings-energy-efficiency-trends.html.

4. Energy Market Regulatory Authority of Turkey (2020). Market Development Report, 2020.

5. Directive 2010/31/Eu of the European Parliament and of the Council of 19 May 2010 on the Energy Performance of Buildings;Hickel;Off. J. Eur. Union,1955

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