Influence of control strategy on seasonal coefficient of performance for a heat pump with low-temperature heat storage in the geographical conditions of Central Europe

Kudela, Libor; Špiláček, Michal; Pospíšil, Jiří

doi:10.1016/j.energy.2021.121276

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…While short term heat load numerical prediction can be carried out using available statistic data [24], the current study is focused on long-term planning, where goals of national and EU energy policy and different socio-economic factors are taken into account. Planning of DH systems can be performed with different techniques, which are broadly presented in scientific literature [25][26][27].…”

Section: Methodsmentioning

confidence: 99%

Environmental Impact of District Heating System Retrofitting

2021

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Retrofitting of district heating systems is a comprehensive process which covers all stages of district heating (DH) systems: production, distribution and consumption. This study quantitatively shows the effect of retrofitting measures and represents strengths and weaknesses of different development scenarios. Improvements in production units show improvements in fuel use efficiency and thus indirectly reduce CO2 emissions due to unburned fuel. For this purpose, validated district planning tools have been used. Tool uses mathematical model for calculation and evaluation of all three main components of the DH system. For the quantitative evaluation, nine efficiency and balance indicators were used. For each indicator, recommended boundary values were proposed. In total, six simulation scenarios were simulated, and the last scenario have shown significant reduction in CO2 emissions by 40% (from 3376 to 2000 t CO2 compared to the actual state), while share of biomass has reached 47%.

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Section: Methodsmentioning

confidence: 99%

Environmental Impact of District Heating System Retrofitting

2021

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“…The seasonal coefficient of performance (SCOP) of a heat pump describes its average performance during the heating and/or cooling season, considering the different energy demands and their variability over time. Many authors have chosen the SCOP as an adequate metric parameter for evaluating the effect of refrigerant drop-in studies [3,4], the effect of the type of compressor used (mono-compressor on/off, multi-compressor, or variable speed compressor) [5][6][7], the effect of the selected bivalent temperature [5,8], the effect of different control strategies [9], or for CO2-emissions and economic analyses of different heating technologies [10] In Europe, Commission Regulation (EU) No. 831/2013 establishes the ecodesign requirements for space heaters, including heat pumps, which evaluation requires the calculation of their seasonal coefficient of performance (SCOP) [11].…”

Section: Heat Pump Descriptionmentioning

confidence: 99%

Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards

et al. 2022

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The seasonal performance of a heat pump indicates its average performance during the heating and/or cooling season, taking into account the different energy demands and their variability over time. Several European and international regulations and policies related with energy efficiency and the reduction of the carbon footprint of energy related products are affecting the heat pump industry. Among them, the ecodesign regulations impose minimum energy efficiency values for heat pumps, efficiencies that are based on the seasonal coefficient of performance. This work is focused on a domestic brine-to-water heat pump for low-temperature applications. The methodology to determine its seasonal coefficient of performance (SCOP) according to the European standard EN 14825 is explained and evaluated based on experimental results. The impact on the SCOP of using some technology options such as fixed or variable speed compressors, and fixed or variable outlet temperature operation is evaluated. Results show that between the lowest and highest efficient option, the SCOP can be improved by 26%.

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“…The heating system was monitored for approximately 3.5 months (1 December to 11 March), and the results showed an improvement of the SCOP (2.95) by 26.1% compared to the SCOP (2.34) of the continuous HP operation without a TEST. Kudela et al [23] presented a computational model of a system, consisting of a HP, a low-temperature heat storage and control unit. In the building examined in this study, a low-temperature heating system with a maximum water temperature of 45 • C was installed.…”

Section: Introductionmentioning

confidence: 99%

Study on Air-to-Water Heat Pumps Seasonal Performances for Heating in Greece

Mouzeviris

Papakostas

2022

Energies

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Air-to-water heat pumps (AWHPs) is a very good option for efficient heating in the residential and commercial building sectors. Their performance and therefore the use of primary energy and CO2 gas emissions are affected by various factors. The aim of this paper is to present a study on the seasonal coefficient of performance in heating (SCOP) of AWHPs, which are available in the Greek market. The sample consists of 100 models in total, offered by 12 manufacturers, in a range of heat pump’s thermal capacity up to 50 kW. The calculation of SCOP values was performed according to the methodology proposed by the EN14825 standard. The results indicate how the heating capacity, the local climate, the supply water temperature, the compressor’s technology, and the control system affect the seasonal performance of the various AWHP models examined. Setting the SCOP ≥ 3 value as a criterion, the analysis that was carried out in four climatic zones A, B, C, and D of Greece, shows that there are many models that meet this criterion, and, in fact, their number increases from the coldest to warmer climates, in combination with lower water supply temperatures to the heating system and a control system with weather compensation.

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Influence of control strategy on seasonal coefficient of performance for a heat pump with low-temperature heat storage in the geographical conditions of Central Europe

Cited by 13 publications

References 21 publications

Environmental Impact of District Heating System Retrofitting

Environmental Impact of District Heating System Retrofitting

Seasonal Efficiency of a Brine-to-Water Heat Pump with Different Control Options according to Ecodesign Standards

Study on Air-to-Water Heat Pumps Seasonal Performances for Heating in Greece

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