Experimental Analysis of the Thermal Performance of a Sunspace Attached to a House with a Central Air Conditioning System

Ma, Qingsong; Fukuda, Hiroatsu; Lee, Myonghyang; Kobatake, Takumi; Kuma, Yuko; Ozaki, Akihito; Wei, Xindong

doi:10.3390/su10051428

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…[5][6][7] The prevailing part of such analyses is based on computer simulations, 1,[8][9][10][11][12][13][14] but some are also supported by experimental research and temperature measurements in existing dwellings. [15][16][17][18][19] The most extensive monitoring of flats with glazed balconies was carried out in Finland, aiming at the estimation of their effectiveness in the cold climate of northern latitude. [16][17][18] The research was carried out in multifamily prefabricated buildings with cantilever or added balconies.…”

Section: Experimental Research On Glazed Balconies In Dwellingsmentioning

confidence: 99%

“…[20][21][22] In some publications, short-time measurements of internal temperature in dwellings with glazed balconies are used for validation of computer simulation programs, applied in further analyses of cooling loads with varying input parameters (such as the balcony's orientation, window to floor area ratio, shading systems, etc.). 19,23,24 Long-term experimental research on the influence of sunspaces on the summer thermal comfort in dwellings is very scarce. The first references to the subject come from Tasks 8 and 20 of the International Energy Agency (IEA) Solar Heating and Cooling Program (SHC), but they did not report overheating problems in the rooms adjacent to greenhouses of single-and multi-family model buildings.…”

Section: Experimental Research On Glazed Balconies In Dwellingsmentioning

confidence: 99%

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Overheating assessment in flats with glazed balconies in warm-summer humid continental climate

Grudzińska

2021

Building Services Engineering Research and Technology

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Greenhouse systems in the form of glazed balconies may be accomplished both in the newly designed buildings and in the existing ones, raising their energy standard in a quick and inexpensive way. However, basic parameters influencing the efficiency of the systems are often chosen intuitively, not allowing to fully benefit from the sunspaces or causing overheating of the rooms and discomfort for the users. These issues are common drawbacks of passive systems and may become especially important in the aspect of anthropogenic climate changes, including temperature rise and summer heatwaves. The paper presents results of a long-term summer temperature monitoring in flats with glazed balconies of different construction. They were located in prefabricated multi-family buildings, in residential districts of Lublin and Zamość. The cities are situated in the south-eastern part of Poland, belonging to the warm-summer humid continental climate area. The monitoring enabled overheating assessment according to the concept of adaptive comfort and connecting it with the sunspace construction and the inhabitants’ behaviour. These issues are new aspects in the research area, and the work is a part of extensive studies including monitoring and dynamic simulations of dwellings with passive greenhouse systems in Poland. Practical application: Glazed balconies raise the energy standard of buildings in a quick and inexpensive way, but it is important to consider their function not only during the heating season but also in the summer. Recording of temperatures enabled the monitoring of thermal conditions in the flats and the overheating assessment. It is possible to keep the internal temperature in the rooms within the desired range thanks to the sunspace ventilation and occupants’ behaviour.

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Section: Experimental Research On Glazed Balconies In Dwellingsmentioning

confidence: 99%

Section: Experimental Research On Glazed Balconies In Dwellingsmentioning

confidence: 99%

Overheating assessment in flats with glazed balconies in warm-summer humid continental climate

Grudzińska

2021

Building Services Engineering Research and Technology

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“…Nevertheless, in such facilities, a significant temperature increase in the greenhouse was also observed by Rempel et al [ 11 ]. During research conducted in Japan by Ma et al, temperatures of up to 40 °C were recorded on sunny winter days inside the glazed loggia, and the period in which temperature exceeded 30 °C accounted for over 70% of the measurement time from November to February [ 12 , 13 ]. Experimental studies on historic small buildings in Spain also confirmed the effectiveness of greenhouses in passive heating of the air.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

“…The authors of [ 20 ] studied the possibilities of reducing heating demand in a building equipped with a modular sunspace prototype placed on the roof, reaching a 25% to 58% reduction in energy use (depending on the climatic conditions). Ma et al [ 12 ] experimentally investigated the thermal performance of a sunspace attached to a house with a central air conditioning system, distributing the preheated air from the solar space. The process was activated depending on the temperature difference between the adjacent bedroom and the sunspace.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Thermal and Optical Properties of the Sunspace Casing as Factors Influencing Temperature Rise in Greenhouse Systems

Grudzińska

2021

Materials

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In sunspaces, there is an observable temperature rise above the external air temperature, caused by solar gains and the buffering effect of their enclosure. In addition, their external partitions form a barrier preventing the direct influence of the external environment and delaying the natural deterioration of elevation surface. In the paper, the temperature rise in a glazed balcony attached to a typical flat in a multifamily building, together with the energy demand in the living zone, were assessed with the use of dynamic computer simulations. Ten variants of the sunspace casing were analysed, with different thermal and solar energy transmittance of the glazing (which is a novel subject in the research area). This enabled us to evaluate average values of the temperature reduction factor during the year and to choose the most efficient variant of the sunspace external partitions. It turned out to be an insulated, double-glazed casing with a spectrally selective coating (type O 21), combining high insulative properties with high solar transmittance. These features allowed the temperature in the sunspace to rise by almost 10°C (compared with the external air) and lower total energy demand in the flat by 33% (compared with a flat with an open balcony).

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Development of Central Air Conditioning Circulation System for Condominium Unit and Evaluation of the Indoor Environment in Summer

Kuma,

Ozaki

2024

Lecture Notes in Electrical Engineering

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Experimental Analysis of the Thermal Performance of a Sunspace Attached to a House with a Central Air Conditioning System

Cited by 12 publications

References 19 publications

Overheating assessment in flats with glazed balconies in warm-summer humid continental climate

Overheating assessment in flats with glazed balconies in warm-summer humid continental climate

Thermal and Optical Properties of the Sunspace Casing as Factors Influencing Temperature Rise in Greenhouse Systems

Development of Central Air Conditioning Circulation System for Condominium Unit and Evaluation of the Indoor Environment in Summer

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