Abstract
When data on certain variables is not available for the construction of a building, generalized models are used to assess their heat consumption. However, buildings and their associated substations in the district heating (DH) network of a city have pretty different parameters. Therefore, an error up to 30% is achieved and moreover that type of assessing results into illogical conclusions. To deal with it, the feasibility and validity of the heat demand characteristics should be verified by a handheld thermal camera at the ground level. The primary way is to improve overall DH system efficiency by reducing distribution losses and ensuring correct supply and return temperatures, other ways are related to reduction of heat losses at a demand side.
Highlights
The feasibility and validity of the heat demand characteristics should be verified by a handheld thermal camera at the ground level
Low temperature district heating (LTDH) so popular in EU [1] stands for district heating (DH) with considerably lowered supply and return temperatures compared to conventional district heating featuring decreasing losses and low operation costs [2]
The feasibility and validity of the heat demand characteristics should be verified by a handheld thermal camera at the ground level as that already widely distributed for locating leaks and large-scale monitoring of DH systems using remote sensing from an aircraft with a thermal camera [7]
Summary
Low temperature district heating (LTDH) so popular in EU [1] stands for district heating (DH) with considerably lowered supply and return temperatures compared to conventional district heating featuring decreasing losses and low operation costs [2]. When data on certain variables is not available for the construction of a building, generalized models are used to assess their distribution or the value of their characteristics Seldom their values are obtained based on expert opinion, but more often with the help of national construction code [4]. Buildings and their associated substations in the DH network of a city have pretty different parameters [5]. Another concern for vast spreading of LTDH in Russia is low indicators of DH system reliability and no availability year round [6]
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