Essential improvements in future district heating systems

Averfalk, Helge; Werner, Sven

doi:10.1016/j.egypro.2017.05.069

Cited by 63 publications

(44 citation statements)

References 7 publications

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“…The experts consider the factor "decreasing heat demand" as a threat. While some authors (e.g., [46]) take lower heat demands in the future into consideration and present this factor as a precondition for 4GDH, the experts taking part in the present survey mentioned an increasing number of active or passive houses as a threat to district heating; a low heat demand could lead to district heating becoming obsolete. The threat of "Competitive technologies", such as heat pumps, was mentioned both in literature and in the interviews.…”

Section: Figurementioning

confidence: 77%

“…The strength factors "Sector coupling" and "Contribution to the decarbonization of the heating sector" were given a low global and local priority by both expert groups, even though these internal strengths are described as a core feature of 4GDH in the literature [4,6,33]. The economic performance of district heating systems compared to concurrent technologies has been widely discussed in the literature [39,[46][47][48]. The experts consider the "Cost efficiency in the short and middle term" as a weakness of 4GDH.…”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

District Heating Systems: An Analysis of Strengths, Weaknesses, Opportunities, and Threats of the 4GDH

2019

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Fourth-generation district heating networks (4GDH) can play a special role in the efficient and climate-friendly use of energy. In this study, we have examined the strengths, weaknesses, opportunities, and threats (SWOT) of this innovative technology. Using a combination of qualitative and quantitative research methods, we assessed the SWOT-factors in terms of their importance. Among the factors that were weighted with the highest relative importance were the ability of 4GDH to serve as a label bundling and stimulating considerations with respect to the further development of district heating systems and the increased value creation within the national economy through the inclusion of local, renewable energy sources. Moreover, the interviewed experts agreed that regulatory frameworks in the context of 4GDH have to be further developed.

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Section: Figurementioning

confidence: 77%

Section: Figurementioning

confidence: 99%

District Heating Systems: An Analysis of Strengths, Weaknesses, Opportunities, and Threats of the 4GDH

2019

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“…The technical measures for establishing this strategic position is to lower the temperature in the district heating grids [13,14]. This increases efficiencies in heat pumps and CHP units, lowers heating grid losses, and makes more potential waste heat streams accessible for district heating.…”

Section: Introductionmentioning

confidence: 99%

District Heating Tariffs, Economic Optimisation and Local Strategies during Radical Technological Change

et al. 2020

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This paper addresses economic aspects of heat savings in the context of strategic heat planning. The analysis uses the city of Aalborg, Denmark, as a case where municipalisation through a recent acquisition of a coal-fired cogeneration of heat and power (CHP) plant has made an update of a municipal strategic energy plan necessary. Combining datasets on buildings and insulation techniques with economic methods, we investigate how the local district heating tariff can be adapted to improve the conditions for heat savings and support the transition to lower supply temperatures in line with the requirements of future fourth generation district heating systems. The paper concludes that implementing a fully variable heat tariff scheme improves the financial incentive for heat savings, while also making the system development less vulnerable to fluctuations and shortages in capital markets. The paper supplements existing literature on heat savings with novelty in its approach and in its systematic investigation of the interplay between tariff policies and interest rates.

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“…These and other bypass flows (intended and unintended through system malfunctions) are a relevant point of attention, with up to 10% of annual water flows in a thermal network resulting from bypass flows [16]. Bypass flows that ensure a high enough supply temperature can cause a high return temperature from the substation, as shown by Crane [17].…”

Section: Developing a Theoretical Benchmark For Bypass Controlmentioning

confidence: 99%

“…Firstly, the simulations only comprised the summer, during which there is very little to no space heating demand (E S H ≈ 0). With the distribution losses and the DHW use changing only slightly across the seasons [15], the resulting summer efficiency can become low, as can be seen in the definition of the network efficiency, shown in Equation 16.…”

Section: System Efficiencymentioning

confidence: 99%

A theoretical benchmark for bypass controllers in a residential district heating network

Vandermeulen

Heijde

Patteeuw

et al. 2018

Energy

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Bypass valves in district heating substations are a compromise between efficiency and quality of service. On the one hand, they are required to ensure that each building (no matter the distance to the heat source) has warm water within an acceptable time. On the other hand, they form a short-circuit between the warm supply and cold return line and their use can increase the return temperature substantially. Therefore, a good control of these bypass valves is critical to limit the drawback of their use. In this context, this paper compares two commonly used control strategies (manual control and thermostat control) to a new theoretical benchmark that provides an upper boundary for the performance of bypass controllers. This theoretical benchmark ensures a justin-time delivery of warm water by taking into account time delays in the network. In a simulation case study of a small neighbourhood in Genk, Belgium, the benchmark shows that substantial improvement regarding bypass control is possible.

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Essential improvements in future district heating systems

Cited by 63 publications

References 7 publications

District Heating Systems: An Analysis of Strengths, Weaknesses, Opportunities, and Threats of the 4GDH

District Heating Systems: An Analysis of Strengths, Weaknesses, Opportunities, and Threats of the 4GDH

District Heating Tariffs, Economic Optimisation and Local Strategies during Radical Technological Change

A theoretical benchmark for bypass controllers in a residential district heating network

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