Influence of sizing strategy and control rules on the energy saving potential of heat pump hybrid systems in a residential building

Dongellini, Matteo; Naldi, Claudia; Morini, Gian Luca

doi:10.1016/j.enconman.2021.114022

Cited by 51 publications

(39 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Savings obtained with respect to the monovalent HP case were of 2-3%, while the PE savings obtained in comparison with the boiler-only solution were more relevant. In a subsequent study, Dongellini et al [20] analyzed the efficiency and the PE consumption of a hybrid system connected in series. The system provides the SH demand of a 140 m 3 residential building located in the Italian city of Bolzano.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Control Strategy and Heating Loads on the Performance of Hybrid Heat Pump Systems for Residential Buildings

et al. 2022

View full text Add to dashboard Cite

Air-to-water heat pumps (HPs) are widely installed in new buildings; however, they face performance degradation with high temperature emission systems, which is typical of existing buildings, or during domestic hot water (DHW) production. Hybrid systems (HSs), composed by air-to-water HPs and gas-fired boilers, can mitigate these issues by increasing the overall system efficiency. HS performance is strictly dependent on the configuration and control management of the system itself. Moreover, the building and heating plant also have a strong influence. This study presents an overview of the application of HSs that considers both space heating (SH) and DHW production, by comparing the primary energy (PE) consumption obtained by dynamic simulations. Different climates, building typologies, and DHW withdrawal profiles are used to extend the results’ validity. Additionally, several HS control strategies were implemented and compared. The results show a PE savings ranging from 5% to 22% depending on the control strategy and the external parameters applied in the simulation. The comparison of the control strategies shows that the most efficient strategies are the ones maximizing heat pump utilization. The dependence of PE savings of HS on COP values is highlighted, and a correlation is presented to provide designers with guidance on the applicability of HSs.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Control Strategy and Heating Loads on the Performance of Hybrid Heat Pump Systems for Residential Buildings

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Seasonal efficiency is calculated by considering several external factors, such as the ambient air temperature, the building thermal or cooling load, the temperatures of the heating or cooling medium, and the HP's control system [4]. The impact of various factors, such as the climate, the compressor technology, and the HP over-or under-sizing in relation to the thermal load of the building and the control system, on the seasonal efficiency of the HP has been studied by various researchers abroad [13,[15][16][17][18][19][20] and in Greece [4,21]. Francesco Madonna and Francesca Bazzocchi [15] presented a model simulating the hourly efficiency of reversible inverter-driven AWHPs and highlighted that the HPs seasonal efficiency is greatly affected by the climate of the location and the HP sizing.…”

Section: Introductionmentioning

confidence: 99%

“…They presented that the energy losses that appear during the on-off cycle operation have a significant impact on the energy performance only for single-stage units (decrease of the SCOP up to 12%). Dongellini et al [20] examined the influence of the heat pump size on the seasonal performance of a hybrid HP system, namely an inverter-driven HP coupled with a back-up heater either with electric resistances or condensing gas boiler. They demonstrated that the overall seasonal efficiency of this system can be increased by up to 22% compared to the efficiency of the gas boiler, if the heat pump covers the 74% of the building design thermal load.…”

Section: Introductionmentioning

confidence: 99%

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

Mouzeviris

Papakostas

2022

Energies

View full text Add to dashboard Cite

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.

show abstract

“…For most heating systems, energy waste mainly arises from inefficient operations of boilers, low efficiency of pipe transmission, and poor quality of heat supply. Therefore, it is of high necessity to analyze the energy consumption of the heating system, and reconstruct the system for better energy efficiency [24][25][26][27][28]. This paper researches and evaluates the energy-saving reconstruction of intelligent community heating (ICH) system based on IoT.…”

Section: Introductionmentioning

confidence: 99%

Research and Evaluation of Energy-Saving Reconstruction of Intelligent Community Heating System Based on the Internet of Things

Sun¹,

Chen²,

Pan³

et al. 2021

IJHT

View full text Add to dashboard Cite

At this critical junction of industrialization, China is facing an increasingly prominent imbalance between energy supply and demand. It is of great social significance to study the energy-saving of buildings that consume a huge amount of energy. For most heating systems, energy waste mainly arises from inefficient operations of boilers, low efficiency of pipe transmission, and poor quality of heat supply. This paper researches and evaluates the energy-saving reconstruction of intelligent community heating (ICH) system based on the Internet of things (IoT). Firstly, the energy-saving reconstruction of the ICH system was analyzed, and a hydraulic regime model was derived from the simplified model of the water supply and return pipe networks. Then, the system pipe network was investigated in three aspects, namely, node flow balance, pipeline pressure drop balance, and loop pressure drop balance. On this basis, the authors presented the balance equation and finalized the hydraulic regime model of the system. After that, the energy consumption of the system was evaluated before and after the reconstruction, and the energy-saving benefit was predicted. The effectiveness of the proposed method was proved through experiments.

show abstract

Influence of sizing strategy and control rules on the energy saving potential of heat pump hybrid systems in a residential building

Cited by 51 publications

References 29 publications

Analysis of the Influence of Control Strategy and Heating Loads on the Performance of Hybrid Heat Pump Systems for Residential Buildings

Analysis of the Influence of Control Strategy and Heating Loads on the Performance of Hybrid Heat Pump Systems for Residential Buildings

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

Research and Evaluation of Energy-Saving Reconstruction of Intelligent Community Heating System Based on the Internet of Things

Contact Info

Product

Resources

About