Reduction of Heat Losses in a Pre-Insulated Network Located in Central Poland by Lowering the Operating Temperature of the Water and the Use of Egg-shaped Thermal Insulation: A Case Study

Dorota Krawczyk , Tomasz Janusz Teleszewski

Abstract

This paper presents possible variants of reducing the heat loss in an existing heating network made from single pre-insulated pipes located in central Europe. In order to achieve this aim, simulations were carried out for five different variants related to the modification of the network operation temperature, replacement of a single network with a double pre-insulated one, and changes in the cross-section geometry of the thermal insulation of the double heating network from circular to egg-shaped. The proposed egg-shaped thermal insulation was obtained by modifying the shape of the Cassini oval, in that the supply pipe has a greater insulation thickness compared to the return pipe. The larger insulation field in the supply pipe contributed to reducing the heat flux density around the supply line and, as a result, to significantly reducing heat loss. The egg-shaped thermal insulation described in the publication in a mathematical formula can be used in practice. This work compares the heat losses for the presented variants and determines the ecological effect. Heat losses were determined using the boundary element method (BEM), using a proprietary computer program written as part of the VIPSKILLS 2016-1-PL01-KA203-026152 project Erasmus+.
Author Dorota Krawczyk (FCEE / HVAC)
Dorota Krawczyk,,
- Heating, Ventilation, Air Conditioning Department (HVAC Department)
, Tomasz Janusz Teleszewski (FCEE / HVAC)
Tomasz Janusz Teleszewski,,
- Heating, Ventilation, Air Conditioning Department (HVAC Department)
Journal seriesEnergies, ISSN 1996-1073, (N/A 140 pkt)
Issue year2019
Vol12
No11
Pages1-12
Publication size in sheets0.55
Keywords in English pre-insulated heating networks, district heating, network, egg-shaped thermal insulation, twin pipes, energy savings, pollutants emission
ASJC Classification1700 General Computer Science
DOIDOI:10.3390/en12112104
URL https://www.mdpi.com/1996-1073/12/11/2104
Internal identifierROC 19-20
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 12-02-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.156; WoS Impact Factor: 2018 = 2.707 (2) - 2018=2.99 (5)
Citation count*1 (2020-03-30)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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