An experimental investigation on the radiant cooled wall's heat transfer characteristics in a fully conditioned real-sized living environment

Abstract

Radiant wall applications have been favored compared to floor and ceiling ones owing to their advantages. In the current work, the heat transfer characteristics of a radiant cooled wall, which are heat fluxes, and heat transfer coefficients, have been experimentally investigated by altering supplied water temperatures and using proper reference temperatures in a fully conditioned real-sized test chamber where the obstacles such as unrealistic room sizes and insufficient air conditioning processes have been eliminated. Detailed methodology for the determination of reference temperature, used thermocouples' locations, and heat gains were revealed. As a result, investigated radiant cooled wall's average total, radiative, and convective heat transfer coefficients were determined as 7.83, 5.14, and 2.57 W/m(2)K, in turn. 67 % of the total heat transfer rate in the mean was found to belong to radiation. Furthermore, novel empirical correlations on the total, radiative, and convective heat transfer coefficients were derived with the mean squared errors of 99 %, 98 %, and 99 %, respectively. There is no experimental investigation on radiant wall cooling excluding authors' previous publications. Finally, a detailed measured and calculated dataset, obtained from the third investigation on the radiant cooling wall system in open sources, was presented for the sake of other researchers. (C) 2022 Elsevier B.V. All rights reserved.