HEAT RECOVERY SYSTEM
After installing the heat recovery unit on the air units of the spray booth, the heat of waste air will be recovered to preheat fresh air. This heat exchange core inside the heat recovery unit increases the temperature of initial air before entry of the heating unit, then attains energy conservation.
During the heat spraying process of the spray booth, the intake fan and exhaust fan work together; the burner ignites inside the heat exchanger and produces large heat; outside fresh air flows to the heating unit after filtered under the fan working. After that, the fresh air can be heated inside the heating unit and enters the booth for spraying. Due to the function of the exhaust fan, the waste air produced by spraying in the booth will be released into the atmosphere through the exhaust air duct after being filtered by fibreglass filters on the booth floor and in the exhaust air unit. Therefore, the considerable heat energy in the waste air will be lost.
Working Principle of Heat Recovery System in YOKISTAR spray booth
Outside fresh air will flow through the Heat Recovery System before entry of the heating unit; waste air will flow through the Heat Recovery System before releasing to the atmosphere; these two airflows will exchange heat inside the core of the Heat Recovery System. Fresh air cleanness can be ensured by completely isolating waste air and fresh air. Therefore, there is a significant rise in new air temperature and a temperature drop in waste air before release. The energy consumption of fresh heating air to required heat spraying temperature is dramatically decreased accordingly.
Analysis of Energy Saving Result
This heat exchange core is applied to the YOKISTAR spray booth.
The average temperature of the air exhausted from the car spray booth is 25℃; the fresh air was intake from outside naturally with temperature -10℃, the relative temperature is 50%.
Before using the heat exchange core body, the spray booth should heat the 21000m3/h fresh air from -10℃ to 25℃, and then the power consumption is 245KW.
But the fresh air heat recovery can reach 49% after using the heat exchange core. The new air temperature can be raised to 7℃ after exchanging through the core body. Then the fresh air can be heated from 7℃ to 25℃ by the heating device with 126KW power consumption.
The energy-saving rate can be reached 48.5% after using the heat exchange core body by reducing the power consumption from 245KW to 126KW.
Heating exchanger core adopts high-quality seawater corrosion coating aluminium foil as a heat conductor, the surface of heat transfer does stamping and foaming to enhance heat transfer area, promote thermal transmission, full recovery of the quantity of heat from exhaust air, without additional energy consumption except for the fan, reach the function of energy-saving.
Between the cross of intake air and exhaust air duct for heating core, there are aluminum foil to separate each other, the edge of intake and exhaust using five layer edges, to strengthen the intensity of borderline, enhance the sealing. Moreover, all joints are sealed with sealant, to protect the air impermeability of heat exchanger core, when the stress within 500pa, the maximum leakage rate will be 5 ‰.
It decreases the maintenance cost because, without moving parts, it is high reliability extended use life.
Easy installation and maintenance can be cleaned by tap water or a neutral detergent solution. The intensity of care is small; it Can be installed on the original exhaust air fan, significantly reducing the investment and operation cost.
a) The core frame is made of sea-water anti-corrosion sheet material in a modular structure to guarantee the high strength of the core body.
b) The reinforced heat transfer technology and the shape of gibbous can ensure the high efficiency of heat exchange and the solidity of the device.
c) The margin of the air entrance has been folded by double 5-level steel to make the high strength and solidity.
d) The cross welt of the sheet bar is sealed with gummosis, and ripple welted to ensure airtightness.
e) The distance between the core body is 2.5-10.0 mm.
