Influence of boundary conditions and component size on electricity demand in solar thermal and heat pump combisystems

Poppi, Stefano; Bales, Chris; Haller, Michel Y.; Heinz, Andreas

doi:10.1016/j.apenergy.2015.10.190

Cited by 45 publications

(15 citation statements)

References 22 publications

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“…More details of the energy balances of the store and the heat pump for the reference system can be found in [75]. Wel,SHP+,pen varies from 119 kWh/year for the SFH45 house in Carcassonne to 949 kWh/year for the SFH100 in Zurich.…”

Section: Reference Systemmentioning

confidence: 99%

Analysis of system improvements in solar thermal and air source heat pump combisystems

et al. 2016

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International audienceA solar thermal and heat pump combisystem is one of many system alternatives on the market for supplying domestic hot water (DHW) and space heating (SH) in dwellings. In this study a reference solar thermal and air source heat pump combisystem was defined and modelled based on products available on the market. Based on the results of an extensive literature survey, several system variations were investigated to show the influence of heat pump cycle, thermal storage and system integration on the use of electricity for two houses in the climates of Zurich and Carcassonne. A singular economic cash flow analysis was carried out and the " additional investment limit " of each system variation was determined for a range of economic boundary conditions. This is the maximum extra investment cost for the system variant compared to the reference system that will give a break even result for a 10 year period. The results shows that variations in electricity price affects the additional investment limit far more than the other economic parameters. Several of the variants show potential for achieving a cost benefit, but the potential varies a lot depending on load and climate boundary conditions. For all variants, the biggest difference in electricity savings was found for Zurich rather than in Carcassonne, which is explained by the larger heating load. However, in three cases the largest savings were for the SFH45 house despite the fact that the annual electricity use of the system is much lower than that for the SFH100 house, 358

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Section: Reference Systemmentioning

confidence: 99%

Analysis of system improvements in solar thermal and air source heat pump combisystems

et al. 2016

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“…Kaygusuz et al introduced energy storage tank in a dual source combined heat pump system to reduce the energy unbalance between the supply side and demand side of the system, and the energy storage played a vital role in energy conservation and could enhance the efficiency and reliability of the system [18]. Poppi et al modeled an air source and solar thermal heat pump combisystem to investigate the impact of component size on electricity demand and optimized the system performance by employing variable speed compressor, four-way valve and vacuum insulation technique [19,20].…”

Section: Introductionmentioning

confidence: 99%

Operation characteristics of a novel dual source multi-functional heat pump system under various working modes

Wang

Huang

2017

Applied Energy

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“…After that, the boundary conditions of the system could also directly affect the system energy consumption. 11,12 Cai et al used numerical simulation and experimental tests to find that during the heating process of solar assisted systems, the COP increased with the increase of solar radiation. When the solar radiation was 0 W/m 2 , the heat pump COP was 2.35, and when the solar radiation was 800 W/m 2 , the heat pump COP was 2.57.…”

Section: Introductionmentioning

confidence: 99%

Performance of building energy supply systems using renewable energy

et al. 2020

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There are two types of renewable energy widely used in China: air-source heat pump and compact all glass solar vacuum pipe water heating systems. To compare the performance of these supply systems, test systems were installed on two adjacent apartment buildings with the same structure, shape, and material. Both sets of equipment were placed in the same environment for the same 31-day period. The performances and performance parameters of the systems were systematically analyzed. The system energy consumption ratio of the compact all glass solar vacuum pipe water heating system was greater than that of the air-source system on 81% of the days in the study period. However, extension theory analysis showed that the weight coefficients for the performance parameters of the two systems were equivalent over the study period. The grey relational degree between the system performance and the parameters were also calculated. The grey correlation degrees of the compact all glass solar vacuum pipe water heating system's properties with outlet temperature, inlet temperature, environment temperature, solar radiation, and sunshine time were 0.69, 0.71, 0.68, 0.70, and 0.68; and the grey correlation degrees of the air source heat pump water heating system's properties with outlet temperature, inlet temperature, environment temperature, solar radiation, and hours of sunshine were 0.71, 0.73, 0.71, 0.65, and 0.72. Furthermore, multivariate regression equations were used to study the changes of other parameters when one of the single variables changes.

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Influence of boundary conditions and component size on electricity demand in solar thermal and heat pump combisystems

Cited by 45 publications

References 22 publications

Analysis of system improvements in solar thermal and air source heat pump combisystems

Analysis of system improvements in solar thermal and air source heat pump combisystems

Operation characteristics of a novel dual source multi-functional heat pump system under various working modes

Performance of building energy supply systems using renewable energy

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