Factors Affecting Indoor Temperature in the Case of District Heating
Chicherin S. Zhuikov A. Junussova L.
November 2023Multidisciplinary Digital Publishing Institute (MDPI)
Sustainability (Switzerland)
2023#15Issue 21
In this study, the influence of variables defining indoor temperature is studied, focusing on operational data and visual and technical inspections rather than the temperature control setpoints and occupancy schedule. This is incorrect because infiltration and insolation are highly variable. This results in lowering the temperature difference between the supply and return lines, overheating some spaces, lowering the indoor temperature in others, and poor hydronic balancing. The novelty lies in studying the actual operating condition of real district heating (DH) systems. The research hypothesis is that internal heat gains along with the infiltration of and variations in outdoor temperature cause daily changes in indoor temperature. These factors seem to be the primary reasons for the variations in supply and return temperature, if the rate of energy loss is not large in new office buildings constructed according to tightened contemporary energy conservation regulations. The saving effect is achieved by allowing the energy to be dumped into building envelopes; thus, the flow rate or supply temperature are varied in a narrower range. Dumping heat by using the storage capacity of building envelopes is suggested. The corrected design approach minimizes energy consumption and increases annual performance (e.g., by 14.1% here). Advantages are achieved by tuning a controller at a DH substation.
building , demand , energy , envelope , supply , window
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Thermo and Fluid Dynamics (FLOW), Faculty of Engineering, Vrije Universiteit Brussel (VUB), Pleinlaan 2, Brussels, 1050, Belgium
Brussels Institute for Thermal-Fluid Systems and Clean Energy (BRITE), Vrije Universiteit Brussel (VUB), Université Libre de Bruxelles (ULB), Brussels, 1050, Belgium
Educational and Scientific Laboratory, Siberian Federal University, Svobodny Ave. 79, Krasnoyarsk, 660041, Russian Federation
Institute of Heat Power Engineering and Control Systems, Almaty University of Power Engineering and Telecommunications (AUPET), Almaty, 050013, Kazakhstan
Thermo and Fluid Dynamics (FLOW)
Brussels Institute for Thermal-Fluid Systems and Clean Energy (BRITE)
Educational and Scientific Laboratory
Institute of Heat Power Engineering and Control Systems
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