A profile extruder cools lines with 45,000 m3/h of 60 C exhaust air. EN159 recovered heat with a heat-pipe unit to warm the shop make-up air.
The Challenge
Cooling exhaust carried heat that was vented while the shop needed make-up air heating in winter. The exhaust carried plastic fines.
Why Heat Pipe Air-to-Air Recovery
Heat pipes handle dusty exhaust with separated streams and no rotating seal to foul. For plastic-fines laden air, separated recovery is safer than a rotary wheel.
The EN159 Solution
EN159 heat-pipe modules, 45,000 m3/h, shop make-up air preheated from 10 C to 35 C, 4 degree tilt, prefiltered exhaust.
Measured Results
- Recovered heat: about 0.6 MW
- Make-up air preheated from 10 C to 35 C
- Winter heating cost cut by 41 percent
- Estimated payback: 18 months
Compliance and Selection Notes
Heat-pipe recovery, separated streams, prefiltered. Rotary wheel excluded for fines-laden duty.
Frequently Asked Questions
Do plastic fines damage it?
A prefilter upstream protects the core; heat pipes themselves have no moving parts to wear.
Where does the recovered heat go?
To shop make-up air, reducing central heating load in winter.
Related Guides and Tools
Heat Pipe Heat Exchangers · Industrial Dryer Heat Recovery · Industrial Waste Heat Recovery · Contact EN159
Get a Site-Specific Recovery Estimate
Talk to an EN159 application engineer about your plastic extrusion exhaust stream. Call 15753355505 or visit our contact page for a site-specific recovery estimate.