Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/140655
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Type: | Journal article |
Title: | Simulation of a radiation-enhanced thermal diode tank (RTDT) assisted refrigeration and air-conditioning (RAC) system using TRNSYS |
Author: | Wang, M. Hu, E. Chen, L. |
Citation: | Journal of Building Engineering, 2023; 82:108168-1-108168-17 |
Publisher: | Elsevier BV |
Issue Date: | 2023 |
ISSN: | 2352-7102 2352-7102 |
Statement of Responsibility: | Mingzhen Wang, Eric Hu, Lei Chen |
Abstract: | The increasing demands for refrigeration and cooling have led to higher energy consumption and greenhouse gas emissions of Refrigeration and Air-conditioning (RAC) systems. To tackle this global challenge, a Radiation-enhanced Thermal Diode Tank (RTDT) has been proposed as an innovative and sustainable condenser-cooling approach to assist the RAC system to save energy. The RTDT is a passive cooling device that utilises a Radiation-enhanced Heat Pipe (RHP) to discharge heat in one direction, i.e., from the interior of a heat-insulated water tank to the surrounding area. In this paper, TRNSYS simulation was used to conduct a case study comparing the performance of the RTDT assisted RAC (RTDT-RAC) system with a reference Air-cooled RAC system under identical ambient conditions in Adelaide, Australia. The findings show that the RTDT-RAC system can save up to 40 % energy compared with the reference RAC system, with an increased Coefficient of Performance (COP) of 5.34. Moreover, a parametric analysis has also been conducted to study the impacts of weather conditions or regions, room temperature setpoints and RHP radiative surface areas on the RTDT-RAC system’s performance. The results of the parametric analysis indicate that the regions with larger day and night ambient temperature differences demonstrate better energy-savings. Both a higher room temperature setpoint and an increased RHP radiative surface area can increase the energy-savings effectively. For a 50 m3 RTDT, to achieve energy-savings, the RHP radiative surface area is found to be at least 2.2 m2 , while the optimal value is about 5 m2 . |
Keywords: | Cooling system; Thermal diode tank; TRNSYS simulation; Cold energy storage; WSHP |
Rights: | © 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
DOI: | 10.1016/j.jobe.2023.108168 |
Published version: | http://dx.doi.org/10.1016/j.jobe.2023.108168 |
Appears in Collections: | Research Outputs |
Files in This Item:
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hdl_140655.pdf | Published version | 9.9 MB | Adobe PDF | View/Open |
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