Optimizing the thermal performance of building envelopes for energy saving in underground office buildings in various climates of China

Abstract

This article investigates the influence of the thermal performance of building envelopes on annual energy consumption in a ground-buried office building by means of the dynamic building energy simulation, aiming at offering reasonable guidelines for the energy efficient design of envelopes for underground office buildings in China. In this study, the accuracy of dealing with the thermal process for underground buildings by using the Designer's Energy Simulation Tool (DeST) is validated by measured data. The analyzed results show that the annual energy consumptions for this type of buildings vary significantly, and it is based on the value of the overall heat transfer coefficient (U-value) of the envelopes. Thus, it is necessary to optimize the U-value for underground buildings located in various climatic zones in China. With respect to the roof, an improvement in its thermal performance is significantly beneficial to the underground office building in terms of annual energy demand. With respect to the external walls, the optimized U-values completely change with the distribution of the climate zones. The recommended optimal values for various climate zones of China are also specified as design references for public office building in underground in terms of the building energy efficiency.

Sustainability and Optimization: From Conceptual Fundamentals to Applications

“…This indicates three phases as shown in Figure 14. In [123], optimizing the thermal performance of building envelopes for energy consumption saving was performed in office buildings in China for various climates. In [124], multi-objective optimization and the analysis of parametric of a solar heating system were investigated for different building envelopes.…”

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“…In view of the examination of selected segments, this investigation demonstrated that there is a critical potential for improving the natural capability of low-ascent buildings, by choosing appropriate parts and materials, continuing the energy execution of the building. The exactness of managing the thermal procedure received for underground buildings by utilizing DeST is approved by estimated information by Shi, L., et al, 2018 [23]. The examined outcomes demonstrated that the yearly energy utilizations for this kind of buildings change altogether, and it depends on the estimation of the general thermal exchange coefficient (U-value) of the envelopes.…”

Recent Advances in the Analysis of Sustainable Energy Systems

“…Therefore, the reduction of building energy consumption is crucial in order to achieve the goals in terms of decarbonization recently established in Paris Agreement. To this scope, several actions are required, such as: building envelope refurbishments [140][141][142], optimization of the HVAC systems [143][144][145][146][147][148][149], utilization of renewable energy sources [150][151][152][153][154][155][156]. This topic was initially marginally investigated during the first SDEWES conferences.…”