Experimental study of a combined system of solar Kang and solar air collector

Wei, Wei; Ji, Jie; Chow, Tommy W. S.; He, Wei; Chen, Haifei; Guo, Chao; Yu, Hao

doi:10.1016/j.enconman.2015.07.029

Cited by 30 publications

(4 citation statements)

References 19 publications

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“…The kang system used solar heated water to represent fuels. Wei et al [16]proposed a novel system combining the solar kang and the solar air collector and studied its alternative operating modes. The daily mean indoor temperature reached 18.5℃ while the temperature in the reference room was 8.9℃.…”

Section: A C C E P T E D Mmentioning

confidence: 99%

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

Zhao

et al. 2019

Energy and Buildings

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Section: A C C E P T E D Mmentioning

confidence: 99%

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

Zhao

et al. 2019

Energy and Buildings

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“…Wei et al. 23 evaluated the performance of a solar hot water-driven Kang system in a passive solar house, and found that the daily mean air temperature in the test room was maintained above 18°C in 13 h. In order to resolve shortcomings of the solar energy system, including high vulnerability to the climate condition, to provide continuous heating, Su et al. 1 presented a heating bed system driven by an air source heat pump and the solar energy.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of a novel heating bed system integrated with a stack effect tunnel

Xin

Lei

et al. 2020

Indoor and Built Environment

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The traditional widely used Chinese Kang heating system has been gradually becoming obsolete, due to the coal or wood burning emission that causes poor indoor air quality. In the interest to preserve the rural life, this study evaluated the performance of a retrofitted traditional Kang heating system with the use of alternative clean energy in a rural-dwelling in Xi'an, China. An air source heat pump (ASHP) was applied to drive the heating bed system, and an indoor stack effect tunnel was incorporated to induce the stack effect and to enhance the heating efficiency. A series of experiments were carried out by varying the exhaust tunnel height and heating mode. The system was shown to have produced significant improvement of the indoor air temperature and satisfied the Chinese standard, GB/T 50824–2013 for rural buildings. For the same mean outdoor temperature, when the stack effect tunnel height was extended from 1.0 m to 1.5 m, a 9.3% improvement in the heat release was obtained. When the heating mode changes from a single flue bottom surface heating to the combined flue bottom and vertical tunnel's lateral surface heating, the enhancement was 43.9%. The system would provide a sustainable way to renovate, upgrade and preserve the traditional Kang system with a use of a cleaner energy source.

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“…Given this goal, Wei et al. 21 proposed an improved scheme by combining the kang system with solar energy; this improved system can satisfy thermal comfort requirements for residential sleeping environments at night. However, it cannot continuously heat the room all day, because solar energy is not always available and there is no supplementary auxiliary heat source.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of a capillary heating bed driven by an air source heat pump and solar energy

Xin

et al. 2019

Indoor and Built Environment

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The traditional Chinese kang is a widely used domestic heating system in rural areas in northern China. However, such system could cause serious air pollution due to burning of biomass materials or coal. An improved bed heating system is introduced in this study to reform the traditional kang, using a capillary mat as a heating terminal, an air source heat pump (ASHP) and a solar energy as the heat source. An experimental prototype was built in a residential house in Xi’an, China, and tests were conducted to evaluate the system’s feasibility and performance under different operational modes. Results showed that the system could effectively provide an acceptable thermal environment for a separately heated room and with a reduced consumption of carbon-based fuel. When the system was completely driven by the ASHP, the daily electricity consumption of the ASHP is only 5.5 kWh with a supply water temperature of 40°C. When coupling the ASHP with the solar energy, the daily hours of solar energy utilization ranged from 3.5 to 4.5 h per day when the ratio of the solar thermal collector area to the floor area was approximately 1.0. The available ratio (days of utilized solar energy to the days comprising the full heating season) exceeded 66.0% over three heating seasons. The system was shown to be a feasible and energy-efficient heating strategy for rural buildings.

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Experimental study of a combined system of solar Kang and solar air collector

Cited by 30 publications

References 19 publications

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

A study on thermal characteristic and sleeping comfort of a hybrid solar heating system applied in cold rural areas

Thermal performance of a novel heating bed system integrated with a stack effect tunnel

Experimental evaluation of a capillary heating bed driven by an air source heat pump and solar energy

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