The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Xu Huining - One of the best experts on this subject based on the ideXlab platform.
-
long term thermal analysis of an airfield runway snow melting system utilizing Heat Pipe Technology
Energy Conversion and Management, 2019Co-Authors: Tan Yiqiu, Chen Fengchen, Ye Qing, Xu HuiningAbstract:Abstract Snow removal is a critical security issue in airports, where Heat-Pipe Technology can be an environmentally friendly and efficient alternative to traditional approaches for snow removal. This study investigated the long-term thermal regime of airfield-runways equipped with a Heat-Pipe system, using data collected over several recent years from two full-scale snow-melting systems, one located in Beijing, and the other in Harbin, China. The findings showed that the Heat-Pipe system automatically increases the airfield-runway surface temperatures by up to 17 °C utilizing geothermal energy in winter for preventing icing. Surface temperature levels up to 0 °C were observed to increase by over 25% when a shallow Pipe embedded depth and a longer Pipe evaporation section were selected. However, the surface temperature was less affected by the diameter of the Heat-Pipe. Field experiments indicated that, the Heat-Pipe Technology threshold value for the airfield-runway snow-melting performance was an ambient air temperature exceeding −10 °C. Using the Heat-Pipe Technology, the snow-melting rate on an airfield-runway was about 3–8 mm/h within the working range, and there was therefore a decrease in the snow-cover durations. Particularly, the Heat-Pipe airfield-runway was always free of snow when the average ambient air temperature exceeded −4 °C. The statistical results illustrated that the Heat-Pipe airfield-runway snow-melting system is applicable in more than 78% of the cities in China, indicating that this Technology is feasible and practical in China and can be applied in other countries.
Tan Yiqiu - One of the best experts on this subject based on the ideXlab platform.
-
long term thermal analysis of an airfield runway snow melting system utilizing Heat Pipe Technology
Energy Conversion and Management, 2019Co-Authors: Tan Yiqiu, Chen Fengchen, Ye Qing, Xu HuiningAbstract:Abstract Snow removal is a critical security issue in airports, where Heat-Pipe Technology can be an environmentally friendly and efficient alternative to traditional approaches for snow removal. This study investigated the long-term thermal regime of airfield-runways equipped with a Heat-Pipe system, using data collected over several recent years from two full-scale snow-melting systems, one located in Beijing, and the other in Harbin, China. The findings showed that the Heat-Pipe system automatically increases the airfield-runway surface temperatures by up to 17 °C utilizing geothermal energy in winter for preventing icing. Surface temperature levels up to 0 °C were observed to increase by over 25% when a shallow Pipe embedded depth and a longer Pipe evaporation section were selected. However, the surface temperature was less affected by the diameter of the Heat-Pipe. Field experiments indicated that, the Heat-Pipe Technology threshold value for the airfield-runway snow-melting performance was an ambient air temperature exceeding −10 °C. Using the Heat-Pipe Technology, the snow-melting rate on an airfield-runway was about 3–8 mm/h within the working range, and there was therefore a decrease in the snow-cover durations. Particularly, the Heat-Pipe airfield-runway was always free of snow when the average ambient air temperature exceeded −4 °C. The statistical results illustrated that the Heat-Pipe airfield-runway snow-melting system is applicable in more than 78% of the cities in China, indicating that this Technology is feasible and practical in China and can be applied in other countries.
Ben Richard Hughes - One of the best experts on this subject based on the ideXlab platform.
-
a passive cooling wind catcher with Heat Pipe Technology cfd wind tunnel and field test analysis
Applied Energy, 2016Co-Authors: John Kaiser Calautit, Ben Richard HughesAbstract:Wind catchers are natural ventilation systems based on the design of traditional architecture, intended to provide ventilation by manipulating pressure differentials around buildings induced by wind movement and temperature difference. Though the movement of air caused by the wind catcher will lead to a cooling sensation for occupants, the high air temperature in hot regions will result in little cooling to occupants. In order to maximise the properties of cooling by wind catchers, Heat Pipes were incorporated into the design. Computational Fluid Dynamics (CFD) was used to investigate the effect of the cooling devices on the performance of the wind catcher, highlighting the capabilities of the system to deliver the required fresh air rates and cool the ventilated space. Qualitative and quantitative wind tunnel measurements of the airflow through the wind catcher were compared with the CFD data and good correlation was observed. Preliminary field testing of the wind catcher was carried out to evaluate its thermal performance under real operating conditions. A cooling potential of up to 12°C of supply air temperature was identified in this study.
-
wind tunnel data of the analysis of Heat Pipe and wind catcher Technology for the built environment
Data in Brief, 2015Co-Authors: John Kaiser Calautit, Hassam Nasarullah Chaudhry, Ben Richard HughesAbstract:The data presented in this article were the basis for the study reported in the research articles entitled 'Climate responsive behaviour Heat Pipe Technology for enhanced passive airside cooling' by Chaudhry and Hughes [10] which presents the passive airside cooling capability of Heat Pipes in response to gradually varying external temperatures and related to the research article "CFD and wind tunnel study of the performance of a uni-directional wind catcher with Heat transfer devices" by Calautit and Hughes [1] which compares the ventilation performance of a standard roof mounted wind catcher and wind catcher incorporating the Heat Pipe Technology. Here, we detail the wind tunnel test set-up and inflow conditions and the methodologies for the transient Heat Pipe experiment and analysis of the integration of Heat Pipes within the control domain of a wind catcher design.
-
climate responsive behaviour of Heat Pipe Technology for enhanced passive airside cooling
Applied Energy, 2014Co-Authors: Hassam Nasarullah Chaudhry, Ben Richard HughesAbstract:A detailed investigation into determining the passive airside cooling capability of Heat Pipes in response to gradually varying external temperatures was carried out. The city of Doha, Qatar was taken as the location of case-study and the climatic data for June 21st, 2012 was incorporated in the transient thermal modelling. The physical domain comprised of 19 cylindrical Heat Pipes arranged in a staggered grid subjected to varying source temperatures. Wind tunnel testing was carried out for the duration of 24h in order to establish a relationship between the source temperatures and their effect on the climate responsive behaviour of Heat Pipes. Infrared thermal imaging was used to capture the surface temperature formations at regular intervals of time during the test. The findings from the study showed that under a low Reynolds Number airstream, the cooling capacity of Heat Pipes increases by 0.1°C for every 1°C rise in external source temperature. Conversely, the investigation showed that the thermal response of Heat Pipes reduces by 0.3°C when subjected to decreasing source temperature gradients of 1°C, thus indicating a low effectiveness. The highest temperature reduction was recorded at 2.3°C indicating a convective Heat transfer of 1546W and a Heat Pipe effectiveness of 8.5%. The test confirmed that in general, the Heat Pipes performed better during the day-time when external temperatures reached over 40°C in comparison to night-time operation when external temperatures dropped below 35°C. The present work successfully characterised the sustainable operation of Heat Pipes in reducing air temperatures without the requirement of any mechanical intervention.
Chen Fengchen - One of the best experts on this subject based on the ideXlab platform.
-
long term thermal analysis of an airfield runway snow melting system utilizing Heat Pipe Technology
Energy Conversion and Management, 2019Co-Authors: Tan Yiqiu, Chen Fengchen, Ye Qing, Xu HuiningAbstract:Abstract Snow removal is a critical security issue in airports, where Heat-Pipe Technology can be an environmentally friendly and efficient alternative to traditional approaches for snow removal. This study investigated the long-term thermal regime of airfield-runways equipped with a Heat-Pipe system, using data collected over several recent years from two full-scale snow-melting systems, one located in Beijing, and the other in Harbin, China. The findings showed that the Heat-Pipe system automatically increases the airfield-runway surface temperatures by up to 17 °C utilizing geothermal energy in winter for preventing icing. Surface temperature levels up to 0 °C were observed to increase by over 25% when a shallow Pipe embedded depth and a longer Pipe evaporation section were selected. However, the surface temperature was less affected by the diameter of the Heat-Pipe. Field experiments indicated that, the Heat-Pipe Technology threshold value for the airfield-runway snow-melting performance was an ambient air temperature exceeding −10 °C. Using the Heat-Pipe Technology, the snow-melting rate on an airfield-runway was about 3–8 mm/h within the working range, and there was therefore a decrease in the snow-cover durations. Particularly, the Heat-Pipe airfield-runway was always free of snow when the average ambient air temperature exceeded −4 °C. The statistical results illustrated that the Heat-Pipe airfield-runway snow-melting system is applicable in more than 78% of the cities in China, indicating that this Technology is feasible and practical in China and can be applied in other countries.
Ye Qing - One of the best experts on this subject based on the ideXlab platform.
-
long term thermal analysis of an airfield runway snow melting system utilizing Heat Pipe Technology
Energy Conversion and Management, 2019Co-Authors: Tan Yiqiu, Chen Fengchen, Ye Qing, Xu HuiningAbstract:Abstract Snow removal is a critical security issue in airports, where Heat-Pipe Technology can be an environmentally friendly and efficient alternative to traditional approaches for snow removal. This study investigated the long-term thermal regime of airfield-runways equipped with a Heat-Pipe system, using data collected over several recent years from two full-scale snow-melting systems, one located in Beijing, and the other in Harbin, China. The findings showed that the Heat-Pipe system automatically increases the airfield-runway surface temperatures by up to 17 °C utilizing geothermal energy in winter for preventing icing. Surface temperature levels up to 0 °C were observed to increase by over 25% when a shallow Pipe embedded depth and a longer Pipe evaporation section were selected. However, the surface temperature was less affected by the diameter of the Heat-Pipe. Field experiments indicated that, the Heat-Pipe Technology threshold value for the airfield-runway snow-melting performance was an ambient air temperature exceeding −10 °C. Using the Heat-Pipe Technology, the snow-melting rate on an airfield-runway was about 3–8 mm/h within the working range, and there was therefore a decrease in the snow-cover durations. Particularly, the Heat-Pipe airfield-runway was always free of snow when the average ambient air temperature exceeded −4 °C. The statistical results illustrated that the Heat-Pipe airfield-runway snow-melting system is applicable in more than 78% of the cities in China, indicating that this Technology is feasible and practical in China and can be applied in other countries.