Brochure
1-150.14
6
DESIGN BENEFITS
Unit Features - Low Water Temperature Greenhouse Heating Units
The Modine model GLW units are specifically designed to heat greenhouses
with low-temperature water. They can be successfully used in applications
where waste or reject heat from steam-electric power plants, refineries,
pumping stations, distilleries, and other industrial or processing plants can
be utilized for heating. With the ever-increasing cost of fossil fuel, utilizing
reject heat as a heat source for greenhouses is a sensible solution with the
model GLW.
Standard features include:
copper connections.
for corrosion resistance in humid environments.
Unit Sizing
Unit performance is based on the flow rate and the temperature of
and the following example for determining performance.
Example:
the entering water temperature and the entering air temperature.
.
GLW660S is 5000.
3. The heating capacity = 5000 x 30 = .
.
5. The water pressure drop from the curve is 0.7 Ft. of water.
Dimensions and Specifications - Model GLW660S, GLW330S
Figure 6.2 - Top View Figure 6.3 - Discharge and Side Views
Weight: GLW330S=200 lbs., GLW660S=380 lbs.
GLW330S
GLW660S
23.88" O.D.
15.75" 31.0"
23.88" O.D.
62.5" - GLW660S
32.5" - GLW330S
8.0"
MAX
31.5"
14.0"
19.0"
38.0"
10.0"
6000
5000
4000
3000
2000
1000
10
Water flow rate
gallons per minute
Water pressure drop
ft. of water
Heating capacity
BTU/HR/ F of ETD
20 30 40 50
1.0
2.0
3.0
4.0
Model GLW660S
Model GLW330S
GLW330
GLW660
Figure 6.1 - Model GLW Performance Curves