Experimental and theoretical investigation of thermal performance of Yaokang heating system in China

Zhu, Jinhua; Xing, Chaojie; Li, Ruixin; Li, Cheng; Zhao, Xi

doi:10.1016/j.enbuild.2020.110344

Cited by 4 publications

(6 citation statements)

References 24 publications

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“…In this optimal manner, the construction industry can operate cost-effectively and sustainably [33][34][35]. Traditional residential buildings in India's composite climate [36,37], Yaodong dwellings in China's Loess Plateau region [38,39], and stilt houses in tropical regions such as Thailand, Laos, Cambodia, Hawaii, and Guam are good examples of the implementation of this theory [40].…”

Section: Methodology 21 Theoretical Foundationsmentioning

confidence: 99%

Climate Adaptability Based on Indoor Physical Environment of Traditional Dwelling in North Dong Areas, China

et al. 2022

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In this study, climate-responsive solutions used in traditional dwellings in the North Dong region of China were identified, and the impact of these solutions on the indoor physical environment and energy consumption was analysed. First, over the course of a year, sample dwellings and short-term on-site indoor physical environment measurements were selected from the local climate. Then, three building materials, namely, brick, wood, and rammed earth, and different structural forms were selected to simulate the indoor thermal environment, ventilation conditions, and energy consumption of traditional dwellings. The study also summarised the advantages and disadvantages of the physical environment of traditional dwellings in response to climate characteristics. The results showed that the fluctuation in indoor temperature and humidity of typical dwellings in the North Dong region is approximately 5 °C, which is 14% lower than that outdoors. Traditional Dong dwellings have good indoor conditioning abilities. Traditional wood structure dwellings can save 26% and 39% of energy per year compared with those of raw earth and brick wood, respectively. Traditional dwellings in the Dong region are well adapted to the local climate in terms of form, materials, and structure and contribute to climate-responsive buildings in the harsh climatic conditions of the region. The solutions used in these dwellings can also be used to design new climate-responsive buildings; however, the indoor thermal comfort is not entirely satisfactory. We proposed an effective adaptation strategy for Dong traditional dwellings.

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Section: Methodology 21 Theoretical Foundationsmentioning

confidence: 99%

Climate Adaptability Based on Indoor Physical Environment of Traditional Dwelling in North Dong Areas, China

et al. 2022

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“…According to Equation (11), under the effects of periodic thermal effect, the unsteady heat transfer through the external wall can be a result of three aspects (Figure 10): The steady heat transfer is caused by the difference between the average comprehensive outdoor temperature and the average indoor air temperature,…”

Section: Heat Transfer Of the Heavy Wall Under Double-sided Thermal E...mentioning

confidence: 99%

“…In other words, a Kang often runs intermittently and cannot provide continuous and stable heat. However, previous research suggested that despite intermittent heating of the Kang, the indoor environment of the cave dwelling remained relatively stable [11]. This means that not only can the outdoor environment fluctuation be suppressed but also the influence of the fluctuation of the indoor heat source on the indoor thermal environment.…”

Section: Introductionmentioning

confidence: 97%

“…One is to obtain the thermal response of cave dwellings to outdoor climate through thermal environment monitoring. For example, in western Henan and Shanxi regions where the cave dwellings are densely distributed, a series of studies for different types of cave dwellings was conducted by Zhu's research group [8][9][10][11] and Liu's research group [6,12,13], and the thermal characteristics of local traditional cave dwellings were acquired. The results showed that the fluctuations of the indoor thermal environment have been effectively suppressed by the heavy wall, and a stable indoor thermal environment was maintained.…”

Section: Introductionmentioning

confidence: 99%

“…The recently improved Kang can reach a comprehensive heat efficiency between 70 and 80% [25]. However, the hourly heat dissipation of the Kang obtained by Xing Chaojie showed that the heat dissipation of the Kang still had large volatility, the Kang's combustion heating could only last for 2 h, and the heat storage capacity of the Kang itself was not enough to maintain the stability of the indoor thermal environment [11]. At present, many studies choose to use new materials, such as PCM [26][27][28][29][30][31][32] or CaO [33][34][35][36], as thermal storage materials, but additional investment costs are required by the new materials.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal Storage Performance of Underground Cave Dwellings under Kang Intermittent Heating: A Case Study of Northern China

Zhu

Liu

et al. 2022

Processes

Self Cite

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The intermittent heating mode of Kang plays an important role in the heat storage and release in cave dwellings. However, research on the effect of Kang heating on the thermal process of traditional buildings is rare. Therefore, based on long-term monitoring of cave dwellings, regular conclusions about the influence of Kang heating on the thermal environment were obtained. Furthermore, an unsteady heat transfer model of the envelope was proposed for the first time. Then, based on this model, the thermal storage performance of cave dwellings during the period of Kang intermittent heating was explored. The results showed that, due to Kang heating, the indoor air temperature of cave dwellings could be increased by an average of 3.1 °C. Furthermore, the inner walls had a large thermal mass and the maximum heat storage in a single day was 487.75 kJ/m2, while the maximum heat release was 419.02 kJ/m2. The heat release at night could reach 87%. In this paper, the law of thermal storage and release characteristics of earthen building envelopes under intermittent heating was firstly obtained. Results can enrich the thermal process theory of earthen buildings and provide a theoretical basis and technical support for building thermal environmental construction.

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Understanding the challenges of determining thermal comfort in vernacular dwellings: A meta-analysis

Costa-Carrapiço

González

Raslan

et al. 2022

Journal of Cultural Heritage

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Experimental and theoretical investigation of thermal performance of Yaokang heating system in China

Cited by 4 publications

References 24 publications

Climate Adaptability Based on Indoor Physical Environment of Traditional Dwelling in North Dong Areas, China

Climate Adaptability Based on Indoor Physical Environment of Traditional Dwelling in North Dong Areas, China

Thermal Storage Performance of Underground Cave Dwellings under Kang Intermittent Heating: A Case Study of Northern China

Understanding the challenges of determining thermal comfort in vernacular dwellings: A meta-analysis

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