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Gas Thermal Radiant Heating Project for Hangzhou Airlines Maintenance Base No.1 Hangar at Beijing Daxing International Airport

time：2025-03-14
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source：正弘奧能

Hangzhou Airlines Maintenance Base No.1 hangar is the largest single project within Hangzhou Airlines' base at Beijing Daxing International Airport. Currently, it is the largest aircraft maintenance hangar in Asia and also the largest single-span and largest-scale maintenance hangar in the world. The steel structure roof truss of the hangar has a span of 404.5 meters, a width of 97.5 meters, and a height of 38.5 meters. The building area is 39,000 square meters, equivalent to the size of 5 standard football fields or 80 standard basketball courts. The hangar is equipped with 5 wide-body aircraft parking positions and 3 narrow-body aircraft parking positions, and can accommodate up to 12 aircraft for parking and maintenance simultaneously, including 2 Airbus A380s and 3 Boeing 777s. 
 

	The No. 1 hangar of Nanjing Airlines Maintenance Base has a large space with a high ceiling height and a wide span. Due to its structural characteristics, the natural convection of outdoor air has a significant impact on the indoor space, resulting in a large amount of heat loss through cold air infiltration. The proportion of ground heat dissipation in the total load is also relatively high. Moreover, due to the large size of the hangar's door and the frequent opening and closing for ventilation, the air exchange volume is large at the moment of opening, causing significant fluctuations in indoor temperature. 


	 
 


	THE CHALLENGE 


	 
 · Energy Efficiency：Ensuring a heating system capable of maintaining comfortable working conditions in such a vast space without excessive energy consumption. 
· Uniform Temperature Distribution：Reducing thermal stratification to ensure consistent heating where maintenance operations are performed. 
· Operational Flexibility：Installing a solution that seamlessly integrates with hangar operations without interfering with daily maintenance activities. 
 


	 


	<img src="http://www.mhsc009.cn/Uploads/image/20250314/20250314092249_50632.jpg" alt="" /> 
 


	 
THE SOLUTION 


	 
 


	The hangar design adopts 84 Ipswich gas radiant heating systems. This system consists of three parts: the generator, the radiant belt and the control system. The system uses natural gas as the heat source and does not require an additional separate heat source. The generator, gas, strong electricity and other equipment are all installed outdoors, which will not increase the fire hazard level of the building and the design difficulty. The radiant belt is hoisted at a height of 32 meters indoors and is installed linearly through a spherical grid without affecting the indoor heating effect or occupying the usable area of the building.&nbsp;The modular design allowed for strategic and customized placement throughout the hangar,ensuring optimal coverage without interfering with aircraft maintenance operations.

 
IMPRESIND gas radiation heating system adopts infrared radiation heating technology. Infrared radiation has the property of non-dispersivity, thus concentrating energy and having a significant thermal effect. The generator burns natural gas and the generated hot fluid flows in the negative pressure centrifugal fan's drive within the radiation tubes made of aluminum alloy steel. The high-temperature surface of the radiation tubes excites and generates infrared radiation waves, and the heat is directed downward for transmission, directly heating the areas it radiates to. Most of the infrared radiation is absorbed by buildings, people, equipment, etc., and stored for energy utilization, causing their temperatures to rise. Meanwhile, after the heat exchange in the radiation tubes, some of the products pass through the premixing chamber and are used for flue gas recirculation for secondary heating, making full use of energy and significantly improving the heating efficiency. 
 

	The supporting control system includes a centralized controller and control system software, which enables remote centralized control. One controller can control up to 59 devices, and independently set temperature parameters for each device, thereby improving the accuracy of temperature control and operational safety. The hangar can be divided and heated at different times according to work requirements, and the equipment can be turned on and off at any time to reduce energy consumption. 


	 
 


	<img src="http://www.mhsc009.cn/Uploads/image/20250314/20250314092301_78287.jpg" alt="" /> 
 

 
In an environment with infrared radiation heating, the indoor temperature is uniform and gentle, and the human comfort is high. The perceived actual temperature by the human body is 2℃ to 3℃ higher than the actual indoor environmental temperature. That is, under the premise of having the same level of comfort, the air temperature in the room with infrared radiation heating can be 2℃ to 3℃ lower than that in the room with convective heating. Therefore, the indoor design temperature of No. 1 hangar is 18℃, and the actual average temperature reaches 20.7℃. The indoor air temperature gradient is small, the heat utilization rate is higher, and it is more energy-efficient. The overall energy savings can reach 30% to 50%.

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Gas Thermal Radiant Heating Project for Hangzhou Airlines Maintenance Base No.1 Hangar at Beijing Daxing International Airport