Long-term investigation of moisture environment in underground civil air defence work

Moisture becomes problematic in underground civil air defence work because of heavy rusting of protection equipment, mould and construction deterioration. This study conducted long-term measurement of the heat and humidity environment in a residential and a non-residential underground civil air defence work in Beijing. The thermal environment was very stable at a good level except in some summer days in the non-residential civil air defence work because of moisture insulation in summer and straw board interior wall furnishing, whereas it was very severe and varied with changing outdoor conditions in the residential civil air defence work. The humidity environment in the residential civil air defence work was wet or very wet (RH > 80%) for over 20% of the year, which may cause mould growth and surface condensation, because of low indoor temperature in winter and occupant activities and natural ventilation in summer. The findings of this study may prove important in elucidating the formation mechanism of thermal environment in civil air defence work and to develop appropriate desiccant solutions.

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STUDY ON THERMAL ENVIRONMENT IN TIDAL FLAT AND MANGROVE AREA BASED ON LONG-TERM MEASUREMENT OF WATER AND SOIL TEMPERATURE

Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering) ◽

10.2208/jscejhe.70.i_1201 ◽

2014 ◽

Vol 70 (4) ◽

pp. I_1201-I_1206

Author(s):

Ryonosuke ENDO ◽

Kazuaki OHTSUKI ◽

Yasuo NIHEI ◽

Wataru HARADA ◽

Yukihiro SHIMATANI

Keyword(s):

Soil Temperature ◽

Tidal Flat ◽

Thermal Environment ◽

Mangrove Area ◽

Long Term Measurement

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An Empirical Study on Time Lag Phenomenon Regarding Summertime Indoor Thermal Environments in the Domestic Buildings of Different Construction Types in Hot-Humid Climate Zone

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.911.504 ◽

2014 ◽

Vol 911 ◽

pp. 504-508 ◽

Cited By ~ 2

Author(s):

Hung Ren Hsieh ◽

Wun Yuan Chen ◽

Hsin Yu

Keyword(s):

Natural Ventilation ◽

Thermal Environment ◽

Time Lag ◽

Humid Climate ◽

Indoor Temperature ◽

Thermal Environments ◽

Temperature And Humidity ◽

Humidity Measurements ◽

Detached House ◽

Heavy Construction

In the empirical case studies of the seven detached house buildings situated in Yilan, Taiwan in a hot and humid climate, this research conducted the actual measurements and analysis of the Summertime Indoor and Outdoor thermal environment parameters in order to accomplish the research of Time Lag Phenomenon of Summertime Indoor Temperature and Humidity in the Buildings of Light (Composite) Constructions and Heavy (Reinforced Concrete) Constructions. Firstly, it indicated that given the condition of doors and windows in closed positions, there would be Time Lag Phenomenon for both of the indoor Temperature and Humidity measurements in domestic buildings. The Temperature Time Lag for Heavy Construction Buildings had a duration of around three hours, almost as twice that of the figure for Light Construction Buildings. There was a significant correlation between Quantity of Interior Finishes and Humidity Time Lag inside domestic buildings, whereas the bigger the Quantity of Interior Finishes, the longer the Humidity Time Lag. Secondly, it also showed that given the condition of doors and windows in opened positions, there was almost zero Time Lag for both of the domestic indoor Temperature and Humidity measurements. Last but not least, generally speaking, the Ratio of Indoor/Outdoor Diurnal Temperature Range of Light Construction Buildings were higher than that of Heavy Construction Buildings. In particular, given the condition of doors and windows in opened positions with natural ventilation in summertime, it was slightly cooler inside the Light Construction Domestic Buildings than the Heavy Construction Domestic Buildings.

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Optimal Design of the External Respiration Double Skin Facade

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.374-377.257 ◽

2011 ◽

Vol 374-377 ◽

pp. 257-262

Author(s):

Shi Feng ◽

Wang Wei

Keyword(s):

Optimal Design ◽

Natural Ventilation ◽

Thermal Environment ◽

External Respiration ◽

Indoor Temperature ◽

Temperature Changes ◽

Indoor Thermal Environment ◽

Double Skin ◽

Computational Fluid Dynamics Cfd ◽

Cfd Method

An optimal design is taken on the external respiration double skin facade (DSF) of a office building in Wuhan. The indoor thermal environment of the office units in the building have been simulated by taken computational fluid dynamics (CFD) method, and then the paper analyzes the indoor temperature changes under the condition that the internal airflow status of the DSF for natural ventilation, without shade, vents closed and other cases, discusses the influences of different inner glazed skin’s thermal properties, DSF for active ventilation and different wind speed on indoor thermal environment, according to the simulation results we obtain parameters of relevant optimal design.

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Field Test for Heat and Humidity Environment and Analysis of Air-Conditioning System Consumption

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.2875 ◽

2012 ◽

Vol 610-613 ◽

pp. 2875-2878

Author(s):

Hui Xing Li ◽

Wei Xiao ◽

Geng Geng ◽

Bei Ni Li ◽

Wei Wang

Keyword(s):

Energy Consumption ◽

Air Conditioning ◽

Thermal Environment ◽

Building Energy ◽

Future Research ◽

Main Body ◽

Indoor Temperature ◽

Air Conditioning System ◽

Air Conditioning Systems ◽

Humidity Environment

Museum has its particularity in public buildings and high research value for its thermal and humidity environment and building energy efficiency status. According to a investigation of air-conditioning systems and a test of indoor heat and humidity parameters in summer and winter for a museum in Shenyang, this article analysis its thermal environment and air-conditioning energy consumption status, draw the winter and summer indoor temperature and humidity and air-conditioning energy consumption chart, research the indoor temperature change rules and the energy consumption status of air-conditioning system in winter and summer. The results show that as air-conditioning energy consumption accounted for the main body of museum’s total building energy consumption, more energy-efficient technologies can be used to reduce the energy consumption of air-conditioning systems. And how to control the thermal environment of different types of collections in this museum, and take a consideration of energy saving, are focues of future research.

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Wind energy and natural ventilation potential of a wind catcher in Yazd – Iran (a long-term measurement)

International Journal of Green Energy ◽

10.1080/15435075.2017.1315807 ◽

2017 ◽

Vol 14 (7) ◽

pp. 650-655 ◽

Cited By ~ 2

Author(s):

Zhaleh Hedayat ◽

Bert Belmans ◽

M. Hossein Ayatollahi ◽

Ine Wouters ◽

Filip Descamps

Keyword(s):

Wind Energy ◽

Natural Ventilation ◽

Long Term Measurement

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Research on the Indoor Thermal Environment of Attached Sunspace Passive Solar Heating System Based on Zero-State Response Control Strategy

Applied Sciences ◽

10.3390/app12020855 ◽

2022 ◽

Vol 12 (2) ◽

pp. 855

Author(s):

Jing Zhao ◽

Dehan Liu ◽

Shilei Lu

Keyword(s):

Control Strategy ◽

Natural Ventilation ◽

Thermal Environment ◽

Northern China ◽

Solar Heating ◽

Heating Season ◽

Cold Region ◽

Indoor Temperature ◽

Response Control ◽

State Response

The application of attached sunspace passive solar heating systems (ASPSHS) for farmhouses can improve building performance, reduce heating energy consumption and carbon dioxide emissions. In order to take better use of the attached sunspace to prevent heat transfer or promote natural ventilation, this paper presented a zero-state response control strategy for the opening and closing time of active interior window in the ASPSHS. In order to verify the application of this strategy, an attached sunspace was built in an actual farmhouse. A natural ventilation heat exchange model was built based on the farmhouse with attached sunspace. The proposed zero-state response control strategy was implemented in TRNSYS software. Field measurement in living lab was carried out to inspect the distribution of the thermal environment in the farmhouse with attached sunspace under a zero-state response control strategy in the cold region of northern China. The experimental results show that, even under −5.0–2.5 °C ambient temperature, the application of zero-state response control strategy effectively increases the internal temperature to an average of 25.45 °C higher than the outside, with 23% indoor discernible temperature differential in the sample daytime. The whole-season heating performance was evaluated by simulating the model for the heating season in 2020–2021. The simulation demonstrates that the ASPSHS under zero-state response control strategy can maintain a basic indoor temperature of 14 °C for 1094 h during the heating season, with a daytime heating guarantee rate of 73.33%, thus ensuring higher indoor heating comfort during the day. When compared to a farmhouse with an attached sunspace under the zero-state response control strategy, the energy savings rate can be enhanced by 20.88%, and carbon emissions can be reduced by 51.73%. Overall, the attached sunspace with the zero-state response control strategy can effectively increase the indoor temperature when the solar radiation is intensive and create a suitable thermal environment for the farmhouse in the cold region of northern China.

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