Numerical Study on Performance Optimization of an Energy-Saving Insulated Window

Zhiqiang Wang, Qi Tian and Jie Jia
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Zhiqiang Wang: Department of Building Environment and Energy Application Engineering, Taiyuan University of Technology, Daxue Street No. 209, Jinzhong 030600, China
Qi Tian: Department of Building Environment and Energy Application Engineering, Taiyuan University of Technology, Daxue Street No. 209, Jinzhong 030600, China
Jie Jia: Department of Building Environment and Energy Application Engineering, Taiyuan University of Technology, Daxue Street No. 209, Jinzhong 030600, China

Sustainability, 2021, vol. 13, issue 2, 1-25

Abstract: Window energy consumption has become a key factor in designing buildings with optimal energy efficiency. To that end, herein, the use of an energy-saving insulated window (ESIW) is proposed, particularly for winter heat conservation. DeST software was used to evaluate the energy consumption properties of a house with an ESIW-structure window, as well as that of six other window structures currently on the market. The results were subsequently compared. Furthermore, a series of numerical simulations were carried out using Airpak software to investigate the insulation performance of four ESIW models (A, B, C, and D) under different influencing factors. Finally, the response surface method (RSM) was used to obtain the optimal ESIW structure installation conditions and the weight of each factor. The data shows that houses with ESIW-structure windows exhibit a more suitable indoor natural temperature; less heating load, cooling load, and cumulative annual load; and a more feasible price–load ratio than other energy-saving windows. Furthermore, the average temperature gradually decreased in response to decreasing the electric heater power and energy-saving standard, and increasing the heat transfer coefficient (HTC) and window-to-wall ratio (WWR). Thus, as the energy-saving standard (ESS) increases, the importance of the WWR increases in parallel. This study puts forward an HTC prediction formula that is applicable to different conditions. The optimal thermal efficiency conditions consisted of HTC = 1.07 W/m 2 × K, WWR = 0.26, and an ESS of 75%. This study demonstrates that the ESIW system has optimal energy-saving properties and broad adaptability and operability, which can be applied in building insulation as a key insulation component.

Keywords: energy-saving insulated window; energy consumption properties; window-to-wall ratio; energy-saving standard; temperature index; heat transfer coefficient; response surface methodology (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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