Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks

The integration of district heating (DH) and cooling (DC) in the sustainable energy system of the future requires a significant reduction in operating temperatures. Supply temperatures below 70 °C are required for new 4th Generation DH. Main benefits are the use of low exergy heat sources and the re...

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Autores principales:	Madan Violeta, Weidlich Ingo
Formato:	article
Lenguaje:	EN
Publicado:	Sciendo 2021
Materias:	cold losses district cooling district heating heat losses Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/75161fe8d8764e0889304abe3be1bbb1
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id	oai:doaj.org-article:75161fe8d8764e0889304abe3be1bbb1
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spelling	oai:doaj.org-article:75161fe8d8764e0889304abe3be1bbb12021-12-05T14:11:10ZInvestigation on Relative Heat Losses and Gains of Heating and Cooling Networks2255-883710.2478/rtuect-2021-0035https://doaj.org/article/75161fe8d8764e0889304abe3be1bbb12021-01-01T00:00:00Zhttps://doi.org/10.2478/rtuect-2021-0035https://doaj.org/toc/2255-8837The integration of district heating (DH) and cooling (DC) in the sustainable energy system of the future requires a significant reduction in operating temperatures. Supply temperatures below 70 °C are required for new 4th Generation DH. Main benefits are the use of low exergy heat sources and the reduction of heat losses. The reduction of heat losses is achieved by reducing the driving temperature difference between the medium pipe and the ground. The decrease of the return temperature level is limited by the consumer behaviour and the ground temperature level. As a consequence, the reduction of the supply temperature is accompanied by a reduction of the maximum transmittable heat flow. For energy efficiency and economic reasons, the relative heat losses are therefore an important design value for DH networks. The study proposes an approach to estimate the relative heat losses by using steady-state heat loss models and analyses the values for different DH generations. In particular, due to the rising of the near-surface soil temperature, the relative cold losses are also studied.Madan VioletaWeidlich IngoSciendoarticlecold lossesdistrict coolingdistrict heatingheat lossesRenewable energy sourcesTJ807-830ENEnvironmental and Climate Technologies, Vol 25, Iss 1, Pp 479-490 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cold losses district cooling district heating heat losses Renewable energy sources TJ807-830
spellingShingle	cold losses district cooling district heating heat losses Renewable energy sources TJ807-830 Madan Violeta Weidlich Ingo Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
description	The integration of district heating (DH) and cooling (DC) in the sustainable energy system of the future requires a significant reduction in operating temperatures. Supply temperatures below 70 °C are required for new 4th Generation DH. Main benefits are the use of low exergy heat sources and the reduction of heat losses. The reduction of heat losses is achieved by reducing the driving temperature difference between the medium pipe and the ground. The decrease of the return temperature level is limited by the consumer behaviour and the ground temperature level. As a consequence, the reduction of the supply temperature is accompanied by a reduction of the maximum transmittable heat flow. For energy efficiency and economic reasons, the relative heat losses are therefore an important design value for DH networks. The study proposes an approach to estimate the relative heat losses by using steady-state heat loss models and analyses the values for different DH generations. In particular, due to the rising of the near-surface soil temperature, the relative cold losses are also studied.
format	article
author	Madan Violeta Weidlich Ingo
author_facet	Madan Violeta Weidlich Ingo
author_sort	Madan Violeta
title	Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
title_short	Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
title_full	Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
title_fullStr	Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
title_full_unstemmed	Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks
title_sort	investigation on relative heat losses and gains of heating and cooling networks
publisher	Sciendo
publishDate	2021
url	https://doaj.org/article/75161fe8d8764e0889304abe3be1bbb1
work_keys_str_mv	AT madanvioleta investigationonrelativeheatlossesandgainsofheatingandcoolingnetworks AT weidlichingo investigationonrelativeheatlossesandgainsofheatingandcoolingnetworks
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Investigation on Relative Heat Losses and Gains of Heating and Cooling Networks

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