Factors Affecting Indoor Temperature in the Case of District Heating

Stanislav Chicherin (), Andrey Zhuikov and Lyazzat Junussova
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Stanislav Chicherin: Thermo and Fluid Dynamics (FLOW), Faculty of Engineering, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
Andrey Zhuikov: Educational and Scientific Laboratory, Siberian Federal University, Svobodny Ave. 79., Krasnoyarsk 660041, Russia
Lyazzat Junussova: Institute of Heat Power Engineering and Control Systems, Almaty University of Power Engineering and Telecommunications (AUPET), Almaty 050013, Kazakhstan

Sustainability, 2023, vol. 15, issue 21, 1-16

Abstract: 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.

Keywords: energy; building; demand; window; envelope; supply (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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