The indoor thermal environment of rural school classrooms in Northwestern China

Liu, Yanfeng; Jiang, Jing; Wang, Dengjia; Liu, Jiaping

doi:10.1177/1420326x16634826

Cited by 35 publications

(11 citation statements)

References 33 publications

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“…They found a neutral temperature of 24.4 • C with an average clothing insulation of 0.48 clo. In contrast a the study conducted by Liu et al [23] in rural school classrooms in Northwest China reported a neutral temperature of 15 • C. Nevertheless, this study reported that the students' average clothing insulation was found to be 1.6 clo, which is much higher than that found in studies in warmer regions.…”

Section: Discussioncontrasting

confidence: 76%

“…If these results are compared with those reported by other studies carried out in educational buildings in different climatic regions, it is found that the T n in cold climates is lower than the T n in warmer climates [23]. Regarding the analysis of students' thermal comfort in regions located in the Tropics, Hamzah et al [22] carried out a study in the tropical city of Makassar and found that the T n values were 29.0 and 28.5 • C for TSV and TCV, respectively, with an average clothing insulation of 0.69 clo.…”

Section: Discussionsupporting

confidence: 48%

“…Hamzah et al [22] found that the students' neutral temperature obtained using the PMV model was lower than the value of neutral temperature obtained from the actual TSV. It is worth noting that, according to the adaptive thermal model, the neutral temperature in warm climates is higher than the neutral temperature in cold climates [23]. Previous studies concluded that students feel comfortable at cooler values of the thermal sensation scale [24,25].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal Perception in Naturally Ventilated University Buildings in Spain during the Cold Season

et al. 2022

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The indoor thermal environment has become a critical factor, due to its impact on the energy efficiency of a building and the health and performance of its occupants. It is particularly important for educational buildings, where students and teachers are exposed to these thermal conditions. This study assessed the impact of natural ventilation efficiency and university students’ thermal perception during the cold season. A field monitoring campaign and a questionnaire survey were conducted. A total of 989 students participated in this study. The results show that, although the CO2 concentration in 90% of the evaluated classrooms was below the European recommended value (i.e., 800 ppm), only 18% of the classrooms were within the thermal comfort zone defined by national regulations. These thermal conditions caused 55% of the students surveyed to report that they were dissatisfied, and that this environment interfered with their academic performance. Significant differences were found between thermal sensation votes from female and male students (p < 0.001). The obtained neutral temperature was one degree higher for female students than for males. Our results suggest that ventilation protocols need to be modified by adjusting the window opening strategy, and these findings should be used as guidelines during their redesign.

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Section: Discussioncontrasting

confidence: 76%

Section: Discussionsupporting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

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Thermal Perception in Naturally Ventilated University Buildings in Spain during the Cold Season

et al. 2022

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“…The indoor air environment is particularly important for safe pipeline operation and the safety of managers in UUTs. 9 Previous studies of indoor air environments have focused on locations such as public buildings, 10–15 residential buildings 16–19 and subway tunnels. 20 , 21 Relatively few studies have evaluated the indoor air environment in UUTs.…”

Section: Introductionmentioning

confidence: 99%

A field measurement of temperature and humidity in a utility tunnel and a brief analysis of the exhaust heat recovery system

Tai

Gao

Lei

et al. 2020

Indoor and Built Environment

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Underground utility tunnels (UUTs) are important components of infrastructure and ‘lifelines’ that ensure urban operations. Temperature and humidity are the main parameters that affect the performance of heat recovery utilization systems in underground spaces. In this study, temperature and humidity measurements were conducted in a UUT in northern China during winter. The results showed that the winter temperature in the UUT was relatively high and constant, and could be maintained above 8.5°C. The relative humidity (RH) in the UUT varied widely but could be kept below 65%. Based on the analysis of the test results, a large amount of waste heat was contained inside the UUT. Therefore, an exhaust air heat recovery (EAHR) system was proposed for the UUT. The coefficient of performance (COP) of the EAHR system for the comprehensive cabin and power cabin is 19.6%–20.3% higher than that of the traditional air source heat pump (ASHP) system. This study can provide the boundary conditions or data validation for the numerical simulation of UUTs in areas with similar climatic conditions and for subsequent research in the combined application of a UUT ventilation system and an ASHP unit.

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“…The energy consumption per household in northern China can be 10 times as much as that in southern China. Although a large amount of energy is consumed for space heating in northern China, the indoor thermal environment is still poor and does not meet the thermal comfort requirement of the occupants [10,11]. Rural energy inefficient buildings, however, are not just a concern in China, which is a developing country; as reported by Roberts et al [12] and Bouzarovski et al [13], the level of fuel poverty in the United Kingdom increased rapidly from 2003 to 2010 due to the dramatic increase in electricity and gas prices.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat Transfer and Thermal Environment in a Rural Residential Building for Addressing Energy Poverty

et al. 2018

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Reducing energy consumption and creating a comfortable thermal indoor environment in rural residential buildings can play a key role in fighting global warming in China. As a result of economic development, rural residents are building new houses and modernizing existing buildings. This paper investigated and analyzed a typical rural residential building in the Ningxia Hui Autonomous Region in Northwest China through field measurements and numerical simulation. The results showed that making full use of solar energy resources is an important way to improve the indoor temperature. Reasonable building layout and good thermal performance of the building envelope can reduce wind velocities and convective heat loss. Insulation materials and double-glazed windows should be used to reduce energy loss in new buildings, although it is an evolution process in creating thermally efficient buildings in rural China. This research provides a reference for the design and construction of rural residential buildings in Northwest China and similar areas for addressing energy poverty.

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The indoor thermal environment of rural school classrooms in Northwestern China

Cited by 35 publications

References 33 publications

Thermal Perception in Naturally Ventilated University Buildings in Spain during the Cold Season

Thermal Perception in Naturally Ventilated University Buildings in Spain during the Cold Season

A field measurement of temperature and humidity in a utility tunnel and a brief analysis of the exhaust heat recovery system

Analysis of Heat Transfer and Thermal Environment in a Rural Residential Building for Addressing Energy Poverty

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