The use of a PCM heat accumulator to improve the efficiency of the district heating substation

Turski, Michał; Nogaj, Kinga; Sekret, R.

doi:10.1016/j.energy.2019.115885

Cited by 28 publications

(14 citation statements)

References 52 publications

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“…The phase change accumulator works well for long-term heat storage. The tests [45] in which the PCM accumulator was used in the heating installation showed that it is possible not only to store excess heat but also to improve the efficiency of the entire system. In this application of the PCM accumulator, it is necessary to install heaters powered by PV panels.…”

Section: Comparison Of Analyzed Battery Typesmentioning

confidence: 99%

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Kurpaska

Knaga

Latała

et al. 2020

Sensors

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This paper presents the results of the analysis of thermal issues and energy efficiency of three types of accumulators; namely stone-bed; water and phase change. Research experiments were carried out during April–October 2013 in a standard commercial semi-cylindrical high plastic tunnel with tomato cultivation of 150 m2. A stone-bed accumulator; with an area of almost 75 m2 was installed in the tunnel below ground level; while a water accumulator with a volume of 4 m3 was installed outside the tunnel. A phase change material (PCM) accumulator, with a volume of 1 m3 containing paraffin, was located inside the tunnel. The heat storage capacity of the tested accumulators and the energy efficiency of the process were determined based on the analyses of the 392 stone-bed charging and discharging cycles, the 62 water accumulator charging cycles and close to 40 PCM accumulator charging and discharging cycles. Dependencies in the form of easily measurable parameters; have been established to determine the amount of stored heat; as well as the conditions for which the effectiveness of these processes reaches the highest value. The presented analysis falls under the pro-ecological scope of replacing fossil fuels with renewable energy. As a result of the analysis; it was found that; in the case of a stone-bed; such an accumulator shows higher efficiency at lower parameters; that is, temperature difference and solar radiation intensity. In turn; a higher temperature difference and a higher value of solar radiation intensity are required for the water accumulator. The energy storage efficiency of the PCM accumulator is emphatically smaller and not comparable with either the stone-bed or the water accumulator.

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Section: Comparison Of Analyzed Battery Typesmentioning

confidence: 99%

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Kurpaska

Knaga

Latała

et al. 2020

Sensors

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“…One of the circumstances determining this low-efficiency is very often the relatively high difference between the heat demand and the heat load of buildings connected to the DH network, which may arise from variable external temperatures during the heating season or differences in heat demand and accumulation between the buildings [2,[58][59][60]. In this case, the main solution is the forecasting of the heat demand based on weather conditions [61] or application of an individual metering system. A different obstacle with DH efficiency refers to the low number of thermal storage systems [60].…”

Section: Low Efficiency Of Heat Supply Systemsmentioning

confidence: 99%

Smart Asset Management for District Heating Systems in the Baltic Sea Region

et al. 2021

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The purpose of this review is to provide insight and a comparison of the current status of district heating (DH) systems for selected Baltic Sea countries (Denmark, Germany, Finland, Latvia, Lithuania, Poland, and Sweden), especially from viewpoints of application and solutions of novel smart asset management (SAM) approaches. Furthermore, this paper considers European projects ongoing from 2016, involving participants from the Baltic Sea Region, concerning various aspects of DH systems. The review presents the energy sources with particular attention to renewable energy sources (RES), district heating generations, and the exploitation problems of DH systems. The essential point is a comparison of traditional maintenance systems versus SAM solutions for optimal design, operating conditions, and controlling of the DH networks. The main conclusions regarding DH systems in Baltic Sea countries are commitment towards a transition to 4th generation DH, raising the quality and efficiency of heat supply systems, and simultaneously minimizing the costs. The overall trends show that applied technologies aim to increase the share of renewable energy sources and reduce greenhouse gas emissions. Furthermore, examples presented in this review underline the importance of the implementation of a smart asset management concept to modern DH systems.

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“…A similar phenomenon is also observed in other European countries, e.g., researchers in the Netherlands [6] and Finland [7] report very similar heat demand profiles. The phenomenon makes the profitability of district heating systems questionable [5] and drives research towards increasing heat consumption during the summer period.…”

Section: Fig 1 Yearly Profile Of Heat Consumption In a Middle-sized Polish City By Chorowski [4]mentioning

confidence: 99%

A hybrid district heating substation with an adsorption chiller and PCM storage units: a concept and preliminary study

et al. 2021

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Development of the district heating system (DHS) is needed to achieve the Renewable Energy Directive goals. To maintain the economic profitability of DHN, the increase of intensity of heat production/consumption has to be ensured. Well, a known method is a cold production using an adsorption heat pump. However, developing a system suitable for implementation in the district heating companies is very difficult. As a solution, the authors propose a composite substation equipped with the adsorption heat pump and the heat/cold storage system based on a PCM.

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The use of a PCM heat accumulator to improve the efficiency of the district heating substation

Cited by 28 publications

References 52 publications

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Smart Asset Management for District Heating Systems in the Baltic Sea Region

A hybrid district heating substation with an adsorption chiller and PCM storage units: a concept and preliminary study

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