Techno-economic analysis of air source heat pump applied for space heating in northern China

Zhang, Qunli; Lin, Zhang; Nie, Jinzhe; Li, Yinlong

doi:10.1016/j.apenergy.2017.06.083

Cited by 237 publications

(59 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This may also lead to a higher difference of the COP between the conventional ASHP unit and the FFASHP unit. COP = Q heating − Q defrosting /(W com,heating + W com,defrosting ) (4) where, Q heasting and Q defrosting are the heating capacity and defrosting capacity of the system, respectively, kW. W com , heating and W com , defrosting are the power consumption of the system in heating period and defrosting period, respectively, kW.…”

Section: Figure 23mentioning

confidence: 99%

“…In the future, combined with a new frosting map, the control strategy for the FFASHP system should be optimized.Energies 2018, 11, 2642 2 of 36 of electricity [2,3]. As shown in Table 1 (the calculation parameters see the literature [4]), compared with the traditional heating way, the ASHP system not only can decrease the amount of primary energy consumption and pollutant emission but can reduce operation cost [4,5]. Therefore, the popularization of the ASHP system will contribute to the development of the clean heating industry in China.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review

Zhang

Zhang³

et al. 2018

Energies

View full text Add to dashboard Cite

Frost layer on the outdoor air heat exchanger surface in an air-source heat pump (ASHP) can decrease the system coefficient of performance (COP). Although the common defrosting and anti-frosting methods can improve the COP, the periodic defrosting not only reduces the system energy efficiency but also deteriorates the indoor environment. To solve these problems, it is necessary to clearly understand the frosting phenomenon and to achieve the system frost-free operation. This paper focused firstly on the analyses of frosting pathways and frosting maps. Followed by summarizing the characteristics of frost-free technologies. And then the performances of two types of frost-free ASHP (FFASHP) systems were reviewed, and the exergy and economic analysis of a FFASHP heating system were carried out. Finally, the existing problems related to the FFASHP technologies were proposed. Results show that the existing frosting maps need to be further improved. The FFASHP systems can not only achieve continuous frost-free operation but reduce operating cost. And the total COP of the FFASHP heating system is approximately 30–64% higher than that of the conventional ASHP system under the same frosting conditions. However, the investment cost of the FFASHP system increases, and its reliability also needs further field test in a wider frosting environment. In the future, combined with a new frosting map, the control strategy for the FFASHP system should be optimized.

show abstract

Section: Figure 23mentioning

confidence: 99%

mentioning

confidence: 99%

Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review

Zhang

Zhang³

et al. 2018

Energies

View full text Add to dashboard Cite

show abstract

“…Zhang et al [5] showed that low temperature ASHP heating mode has lower primary energy consumption and lower dioxide pollution emissions compared with coal boiler, gas boiler and direct electric heating mode. T Chen et al [6] indicated that heat pump heating system would have lower cost and less environment impact than other systems if its COP is above 3.…”

Section: Introductionmentioning

confidence: 99%

“…To evaluate ASHP for space heating, studies compared its initial investment, running cost and environmental impacts with conventional space heating systems [5][6][7][8][9][10]. Zhang et al [5] showed that low temperature ASHP heating mode has lower primary energy consumption and lower dioxide pollution emissions compared with coal boiler, gas boiler and direct electric heating mode.…”

Section: Introductionmentioning

confidence: 99%

“…Air source heat pump (ASHP) is becoming a promising device for space heating in North China due to its energy-savings, environmental friendliness, and application flexibility [4,5]. ASHP has been carried out as a main method in the "coal to electricity" clean heating reform work and appointed to be a promoted substitution for existing small coal boilers in rural residential buildings of North China [5]. However, the utilization of ASHP for space heating still faces challenges such as heating capacity, frosting and low coefficient of performance (COP).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Mixture Refrigerant for Space Heating Air Source Heat Pump: Theoretical Modelling and Performance Analysis

2018

Self Cite

View full text Add to dashboard Cite

Featured Application: This paper proposed a new mixture refrigerant named RHR-1with high energy efficiency, no ODP (ozone depletion potential) and low GWP (global warming potential), which suitable for ASHP (air source heat pump) heating in residential buildings of rural areas in North China.Abstract: Air source heat pump (ASHP) is becoming a substitute for small coal boilers in rural residential buildings of North China. However, the application of ASHP faces challenges of heating capacity, energy efficiency, ozone depletion potential (ODP) and global warming potential (GWP). Proper refrigerant is a key factor influences the performance of ASHP. In this paper, a new mixture refrigerant named RHR-1 is proposed, which aimed to improve energy efficiency, eliminate ODP and reduce GWP of ASHP refrigerant. The performance of RHR-1 was analyzed and compared with commonly used refrigerants including R134a, R410A, R407C and R22 in terms of heating coefficient of performance (COP h ), compression ratio (CR) and discharging temperature (DT). The results show that, under the design cases, where supply water temperatures vary from 35 • C to 50 • C and outdoor air temperatures vary from −15 • C to 15 • C, the COP h of RHR-1 are in the range of 2.43-4.93. The COP h of RHR-1 is higher than other candidates when the supply water temperature is above 40 • C. The CR and DT of RHR-1 are in medium levels of the compared samples. A logarithmic regression equation was deduced to get the relationship of COP h with temperature difference between supply water and outdoor air which suggested the temperature difference should be controlled within 47.5 • C to get reasonable COP h . In addition, RHR-1 has no ODP, and its GWP is 279, which is much lower than other candidates. RHR-1 could be a reasonable refrigerant used in ASHP for space heating in North China.

show abstract

Energy and environmental performance of a heat pump in different power grid scenarios

2020

View full text Add to dashboard Cite

Electric-driven heat pumps are one of the most encouraging systems that could support the raising of renewables contribution in civil sector energy consumption, especially with reference to the Countries with a high contribution of renewable energy sources in electricity generation mix. However, the evaluation of the effective energy and environmental performance of an electric heat pump meeting the space heating and cooling requests of a building has to consider several factors that affect the results. Among them great attention should be given to the variability of weather conditions in which the system operates, the changeability of the

show abstract

Techno-economic analysis of air source heat pump applied for space heating in northern China

Cited by 237 publications

References 21 publications

Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review

Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review

A New Mixture Refrigerant for Space Heating Air Source Heat Pump: Theoretical Modelling and Performance Analysis

Energy and environmental performance of a heat pump in different power grid scenarios

Contact Info

Product

Resources

About