Thermal efficiency of a solar power system in a collective residential structure based on performance tests

Sawicka-Chudy, Paulina; Rybak-Wilusz, E.; Cholewa, M.

doi:10.1063/1.4966158

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…The ground source heat pump is used only during heating season. Domestic hot water out of the space heating system is accomplished via the solar thermal system operation, which operates very effectively in Polish conditions [18,24]. From May until the end of September the thermal solar energy system can cover all DHW heating demand.…”

Section: Final Heating Energy Consumption Of the Buildingmentioning

confidence: 99%

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Determination of the Energy Performance of a Solar Low Energy House with Regard to Aspects of Energy Efficiency and Smartness of the House

Chwieduk

2020

Energies

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The paper shows how difficult it is to prove technically that a building really is both low energy and smart, and that all aspects of energy efficiency have been treated equally. Regulations connected to the determination of the energy performance of residential buildings take into account only space and hot water heating energy consumption and define the indices of maximal primary energy consumption, but not energy needs based on the architecture of the building. A single family house designed and constructed as a low energy solar house in Warsaw’s suburbs is considered. Availability of solar energy and its influence on the architecture of the house is analyzed. A specific solar passive architectural concept with solar southern and cold northern buffer spaces incorporated into the interior of the house is presented. Parameters of the building’s structure, construction materials, as well as operation parameters of equipment and heating systems based on active use of solar energy, ground energy (via a heat pump) and waste heat from a ventilation system are described. Results of calculations give values of final and primary energy consumption index levels of 11.58 kWh/m2 and 25.77 kWh/m2, respectively. However, the official methodology for determination of energy performance does not allow for presenting how energy efficient and smart the building really is.

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Section: Final Heating Energy Consumption Of the Buildingmentioning

confidence: 99%

“…Polish conditions [18,24]. From May until the end of September the thermal solar energy system can cover all DHW heating demand.…”

Section: Final Heating Energy Consumption Of the Buildingmentioning

confidence: 99%

Determination of the Energy Performance of a Solar Low Energy House with Regard to Aspects of Energy Efficiency and Smartness of the House

Chwieduk

2020

Energies

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“…Thus, the intensive research in the field of solar thermal collectors has had the aim to improve the specification of solar thermal collectors to increase their efficiency within approximately 20 years [24][25][26][27]. However, they still have a higher initial cost than conventional water heating systems, this being a major obstacle to its adoption by low income families and leading to the need for an economic analysis of this system.…”

Section: Solar Water Heating Systemsmentioning

confidence: 99%

“…Economic efficiency expressed by the payback time of active SWH system investment differs depending on the solar system producer and the fuel/heat source that is substituted, and can range from 6 to 16 years [35]. From the economic cost-effectiveness analysis of SWH systems, Sawicka-Chudy et al (2016) found that the simple payback time of modernization is around 16 years [24]. Argiriou et al (1997) found a better cost-benefit ratio, a low payback period for SWH systems and a reduction of CO 2 emissions by 40% in Greece [36].…”

Section: Solar Water Heating Systemsmentioning

confidence: 99%

Economic and Environmental Analysis of Investing in Solar Water Heating Systems

et al. 2016

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Solar water heating (SWH) systems can provide a significant part of the heat energy that is required in the residential sector. The use of SWH systems is motivated by the desire to reduce energy consumption and especially to reduce a major source of greenhouse gas (GHG) emissions. The purposes of the present paper consist in: assessing the solar potential; analysing the possibility of using solar energy to heat water for residential applications in Romania; investigating the economic potential of SWH systems; and their contribution to saving energy and reducing CO 2 emissions. The results showed that if solar systems are used, the annual energy savings amount to approximately 71%, and the reduction of GHG emissions into the atmosphere are of 18.5 tonnes of CO 2 over the lifespan of the system, with a discounted payback period of 6.8-8.6 years, in accordance with the savings achieved depending on system characteristics, the solar radiation available, ambient air temperature and on heating load characteristics. Financially, the installation of SWH systems determines net savings of 805-1151 Euro in a 25-year period in the absence of governmental subsidies. According to the sensitivity analysis, installing a SWH system with subsidies of up to 50% determines the reduction of the discounted payback period to 3.1-3.9 years and the increase of net savings to 1570-1916 Euro. These results indicate that investing in these systems is cost-effective for Romanian households as long as the governmental subsidies increase.

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