HEAT RECOVERY SYSTEM
After installing the heat recovery unit on the spray booth’s air units, the heat of waste air will be recovered to preheat fresh air. This heat exchange core inside the heat recovery unit increases the initial air temperature before the heating unit enters, 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 amounts of heat; outside, fresh air flows to the heating unit after being filtered by the fan. After that, the fresh air can be heated inside the heating unit and enter 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 fiberglass 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. Completely isolating waste air and fresh air can ensure the cleanness of 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 the required heat spraying temperature dramatically decreases 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℃; fresh air was absorbed from outside naturally at -10℃, and 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.
However, fresh air heat recovery can reach 49% after using the heat exchange core. The new air temperature can be raised to 7℃ after being exchanged through the core body. Then the fresh air can be heated from 7℃ to 25℃ by the heating device with 126KW power consumption.
Reducing the power consumption from 245KW to 126KW can achieve an energy-saving rate of 48.5% after using the heat exchange core body.
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.
