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Small demonstrator of a thermoelectric heat-pump booster for an ultra-low-temperature district-heating substation [Elektronski vir]Tomc, Urban ...Heating and cooling systems account for approximately 50% of global energy consumption and contribute 40% of carbon dioxide emissions. District-heating systems offer enhanced energy efficiency, ... diversification, independence from energy sources, and the utilization of waste and renewable energy sources. One key energy-efficiency measure in district heating is reducing the supply and return temperatures. Fourth-generation district-heating systems operate with supply temperatures of 50 to 60 °C, enabling better utilization of renewable and waste heat. Fifth-generation district-heating systems further lower the supply/return temperatures, requiring additional heat sources, such as boosters, to heat domestic hot water. Heat pumps, specifically vapour-compression heat pumps, are the most energy-efficient devices for converting fuels or electricity into heat for space and water heating. However, vapour-compression technology faces challenges related to environmentally friendly refrigerants, noise, vibration, compactness, and energy efficiency, especially for small units. In this study, we introduce a novel design of thermoelectric-based heat-pump booster. Despite its lower exergy efficiency, this technology offers advantages such as compactness, silent operation without vibration, easy power control, and longevity. We demonstrate that these thermoelectric heat-pump boosters can increase the supply-water temperature of district-heating systems from around 32 °C to 42 °C, with a heating coefficient of performance equal to 2.4 and an exergy efficiency of 9.9%.Source: Applied energy [Elektronski vir]. - ISSN 1872-9118 (Vol. 361, [article no.] 122899, May 2024, str. 1-14)Type of material - e-article ; adult, seriousPublish date - 2024Language - englishCOBISS.SI-ID - 186961923
Author
Tomc, Urban |
Nosan, Simon |
Vidrih, Boris |
Bogić, Simon |
Navickaite, Kristina |
Vozel, Katja, 1990- |
Bobič, Miha, strojnik |
Kitanovski, Andrej
Topics
district heating |
thermoelectrics |
heat pump booster |
energy efficiency |
daljinsko ogrevanje |
termoelektrika |
podporna toplotna črpalka |
energijska učinkovitost
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Tomc, Urban | 34418 |
Nosan, Simon | 50705 |
Vidrih, Boris | 23834 |
Bogić, Simon | 54860 |
Navickaite, Kristina | 55469 |
Vozel, Katja, 1990- | 54938 |
Bobič, Miha, strojnik | 20351 |
Kitanovski, Andrej | 18580 |
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