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Evaluating the integration of apartment building heating systems with low-temperature district heating networks
by
Misevičiūtė, Violeta
, Bielskus, Juozas
, Streckienė, Giedrė
, Rogoža, Artur
, Lapinskienė, Vilūnė
in
Apartment buildings
/ Apartments
/ building modernization
/ Central heating
/ Devices
/ District heating
/ district heating (DH)
/ Heat
/ Heat transfer
/ Heating
/ heating system
/ Heating systems
/ High temperature
/ Low temperature
/ Modernization
/ Radiators
/ Refurbishment
/ Space heating
/ Temperature
2025
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Evaluating the integration of apartment building heating systems with low-temperature district heating networks
by
Misevičiūtė, Violeta
, Bielskus, Juozas
, Streckienė, Giedrė
, Rogoža, Artur
, Lapinskienė, Vilūnė
in
Apartment buildings
/ Apartments
/ building modernization
/ Central heating
/ Devices
/ District heating
/ district heating (DH)
/ Heat
/ Heat transfer
/ Heating
/ heating system
/ Heating systems
/ High temperature
/ Low temperature
/ Modernization
/ Radiators
/ Refurbishment
/ Space heating
/ Temperature
2025
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Evaluating the integration of apartment building heating systems with low-temperature district heating networks
by
Misevičiūtė, Violeta
, Bielskus, Juozas
, Streckienė, Giedrė
, Rogoža, Artur
, Lapinskienė, Vilūnė
in
Apartment buildings
/ Apartments
/ building modernization
/ Central heating
/ Devices
/ District heating
/ district heating (DH)
/ Heat
/ Heat transfer
/ Heating
/ heating system
/ Heating systems
/ High temperature
/ Low temperature
/ Modernization
/ Radiators
/ Refurbishment
/ Space heating
/ Temperature
2025
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Evaluating the integration of apartment building heating systems with low-temperature district heating networks
Journal Article
Evaluating the integration of apartment building heating systems with low-temperature district heating networks
2025
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Overview
Any renovation of apartment buildings by replacing or keeping their heating devices usually means that high temperatures of the heat carrier are maintained, which restricts boosting the efficiency of a central heating supply system. This also limits the scope for a switch to more efficient systems such as low-temperature district heating systems. To assess the impact of reducing the heat carrier temperature on indoor heating with a constant radiator area, the article investigates several alternatives alongside a base case scenario. In one scenario, the modernization of a building is examined, either by retaining the current heating devices or by substituting them with devices of equal size. Another scenario explores the modernization of a building by exchanging the heating devices and adjusting the building’s heating system to accommodate ultra-low temperatures. The possibility to reduce the temperature of the heat carrier in the heating system without any renovation of the building has been addressed as well. This led to seven alternatives. The analysis of the hourly data of the heating system model for two typical months in a heating season has revealed that when the building retains its existing area of heating devices post-renovation, the temperature can be brought down to 60/40/20 °C. It was also discovered that lowering the heat transfer temperature to ultra-low parameters (45/25/20 °C) cannot be achieved by refurbishing the buildings without increasing the number of radiators, as the heating devices will fail to deliver adequate heat for space heating.
Article in English.
Daugiabučių namų šildymo sistemų integravimo į žemos temperatūros centralizuoto šilumos tiekimo tinklus vertinimas
Santrauka
Daugiabučių namų renovacija, keičiant ar paliekant jų šildymo prietaisus, paprastai reiškia, kad reikia išlaikyti aukštą šilumnešio temperatūrą, o tai riboja centralizuoto šilumos tiekimo (CŠT) sistemos efektyvumo didinimą. Be to, tai apriboja galimybę pereiti prie efektyvesnių sistemų, pavyzdžiui, žematemperatūrių CŠT sistemų. Siekiant įvertinti sumažintos šilumnešio temperatūros poveikį patalpoms šildyti, kai radiatorių plotas išlieka pastovus, straipsnyje išnagrinėtos kelios alternatyvos ir bazinis scenarijus. Pagal vieną scenarijų nagrinėjamas pastato modernizavimas, paliekant esamus šildymo prietaisus arba pakeičiant juos tokio pat dydžio prietaisais. Pagal kitą scenarijų nagrinėjamas pastato modernizavimas pakeičiant šildymo prietaisus ir pritaikant pastato šildymo sistemą itin žemai temperatūrai. Taip pat nagrinėta galimybė sumažinti šilumnešio temperatūrą šildymo sistemoje neatnaujinant pastato. Tai leido parengti septynias alternatyvas. Išanalizavus šildymo sistemos modelio valandinius dviejų tipinių šildymo sezono mėnesių duomenis paaiškėjo, kad, po renovacijos pastate išlaikant esamą šildymo prietaisų plotą, temperatūrą galima sumažinti iki 60/40/20 °C. Taip pat nustatyta, kad renovuojant pastatus neįmanoma sumažinti šilumos perdavimo temperatūros iki itin žemų parametrų (45/25/20 °C) nekeičiant esamo radiatorių skaičiaus, nes šildymo prietaisai nesugebės tiekti pakankamai šilumos patalpoms šildyti.
Reikšminiai žodžiai: centralizuotas šilumos tiekimas (CŠT), pastatų modernizavimas, šildymo sistema, žema temperatūra.
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