Theoretical overview of heating power and necessary heating supply temperatures in typical Danish single-family houses from the 1900s

Østergaard, Dorte Skaarup; Svendsen, Svend

doi:10.1016/j.enbuild.2016.05.034

Cited by 46 publications

(37 citation statements)

References 9 publications

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“…This should be seriously considered as a heat source when planning a new DHN, however it is likely to be difficult in the UK due to the necessary and complicated balance between the agreement with the industry source, the DHN operator and maintaining a competitive cost to the end user. A number of studies have demonstrated that older building stock can be upgraded and integrated with lower temperature district heating networks to allow for operation at supply temperature of 45 • C for space heating [10,[18][19][20][21]. It has been shown that reducing the operating temperature of DHNs from 80/40 • C (typical of 3G DHN) to 60/30 • C can provide over 30% saving of heat losses from the network [18].…”

Section: Fourth Generation (4g) District Heatingmentioning

confidence: 99%

District Heating Challenges for the UK

Millar

Burnside

2019

Energies

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District heating uptake has grown with the increasing need for cleaner and more efficient energy supply. This has resulted in a rising number of new developments signing up to a district heating scheme, typically powered by Combined Heat and Power (CHP) boilers or biomass boilers with supplemental electrical or gas grid connections. These schemes have advanced rapidly in recent years, with much of the research focus targeting lower carbon technologies, improved load prediction and peak demand management. We assess the current status of District Heating Networks (DHNs) in the United Kingdom using published case studies and suggest next steps to improvement. Our findings show that the United Kingdom has good potential for uptake of district energy given the current political climate and government incentives, however significant improvements must be made to further penetrate the heating market.

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Section: Fourth Generation (4g) District Heatingmentioning

confidence: 99%

District Heating Challenges for the UK

Millar

Burnside

2019

Energies

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“…A study on heating power and necessary supply temperatures in typical Danish single-family houses from the 1900s found that there is considerable potential for using low-temperature space heating in existing single-family houses in typical operation conditions [37]. Although radiators should not necessarily be expected to be oversized, older houses were not always found to require higher temperatures levels than newer houses.…”

Section: Dimensioning Of Heating Systems In Buildingsmentioning

confidence: 99%

Is It Possible to Supply Norwegian Apartment Blocks with 4th Generation District Heating?

2019

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Direct electricity is widely used for heating purposes in Norway, leading to significant strain on the electricity grid during the heating season. Conversion to 4th generation district heating (4GDH) is an effective method for reducing the need for large investments in the electricity grid, while simultaneously improving the energy efficiency of district heating systems. This article evaluates the possibility of reducing the supply temperature in existing Norwegian apartment blocks by improving the thermal envelope and reducing the temperature levels for the heating system. The analysis is based on simulations in IDA ICE (IDA Indoor Climate and Energy) focusing on whether the reduced supply temperature guarantees thermal comfort in the building, considering the coldest room with a heating setpoint of 22 °C. Based on a recommended minimum acceptable indoor temperature of 19 °C from the Norwegian building regulations (TEK), it should be possible to lower the radiator supply temperature from 80 to 60 °C for apartment blocks newer than 1971. For older buildings, an “intermediate” renovation is necessary to maintain temperatures above 19 °C, however, a “standard” renovation is recommended to ensure thermal comfort and improve the energy efficiency of the building stock.

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“…Existing buildings will remain the major part of the building stock in the future due to the lifetime of buildings. According to literature, [2,8,[11][12][13], it is possible to operate the SH systems of existing buildings with low supply temperatures during most of the year. The SH systems in existing buildings are generally dimensioned for ambient temperatures that only rarely occur, and they are large enough to ensure proper thermal comfort for lower supply temperatures.…”

Section: Introductionmentioning

confidence: 99%

Improved Control of Radiator Heating Systems with Thermostatic Radiator Valves without Pre-Setting Function

et al. 2019

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Low-temperature district heating will play an important role in a future free of fossil fuels. This will only be able to be realized through the low-temperature operation of heating systems in existing buildings. Existing radiator systems can operate with low temperatures for most of the year because they are designed for extremely cold days, but errors have to be corrected and the control of the radiator systems needs to be improved. In this paper, we present a strategy to achieve low-temperature operation from the radiator system of a multi-family building in Denmark without a pre-setting function in the thermostatic radiator valves. The strategy is based on operating the system with a combination of a minimum supply temperature and small temperature differences over the radiators. The operation of the system is analyzed through a thermal-hydraulic model. A minimum supply temperature weather compensation curve was calculated and implemented in the central supply temperature control. Return temperature measurements in the substation, the risers, and several critical radiators were performed before and after the implementation of the strategy. The measurements confirm that a lower supply temperature results in a reduction of the return temperature. However, the system operator needs to be supported by a tool package to correctly maintain the system’s operation.

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Theoretical overview of heating power and necessary heating supply temperatures in typical Danish single-family houses from the 1900s

Cited by 46 publications

References 9 publications

District Heating Challenges for the UK

District Heating Challenges for the UK

Is It Possible to Supply Norwegian Apartment Blocks with 4th Generation District Heating?

Improved Control of Radiator Heating Systems with Thermostatic Radiator Valves without Pre-Setting Function

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