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I decided to do an experiment today. the basis of the experiment is this:
"Will a HERMs coil used to cool down wort after a boil be cooled down significantly faster and lower temp with a heat exchanger to help cool the water in the HERMs tank."
Air temp: 71°F
setup for test:
1) heat 5 gal of water in the boil kettle to 180°F
2) fill Herms tank with room temp water to be used to cool boil kettle water.
3) circulate boil kettle water through HERMs coil in HERMs tank.
4) record temp of boil kettle every 5 minutes for 30 minutes.
control test:
5 gal of Boil kettle water: 180°F
HERMs tank water: 71°F
5 min: 144°F
10 min: 133°F
15 min: 128°F
20 min: 126°F
25 min: 124°F
30 min: 122°F
HERMs tank temp: 120°F
This is typical of how cool I can get the wort on brew day. getting the wort to pitch temp is accomplished the rest of the way using my glycol chiller.
2nd test:
5 gal of boil kettle water : 180°F
HERMs tank water : 75°F (water from hose was warmer)
this time the water from HERMs tank will be pumped through a 12" x 15" 4 core heat exchanger with a 10" cooling fan to cool the HERMs tank water.
5 min: 128°F
10 min: 113°F
15 min: 106°F
20 min: 102°F
25 min: 98°F
30 min: 95°F
Herms tank: 87°F
As you can see the temp of the heated water was cooled 27° cooler with the heat exchanger than without it. Not sure if this is a necessary step, but it was fun to biuld
"Will a HERMs coil used to cool down wort after a boil be cooled down significantly faster and lower temp with a heat exchanger to help cool the water in the HERMs tank."
Air temp: 71°F
setup for test:
1) heat 5 gal of water in the boil kettle to 180°F
2) fill Herms tank with room temp water to be used to cool boil kettle water.
3) circulate boil kettle water through HERMs coil in HERMs tank.
4) record temp of boil kettle every 5 minutes for 30 minutes.
control test:
5 gal of Boil kettle water: 180°F
HERMs tank water: 71°F
5 min: 144°F
10 min: 133°F
15 min: 128°F
20 min: 126°F
25 min: 124°F
30 min: 122°F
HERMs tank temp: 120°F
This is typical of how cool I can get the wort on brew day. getting the wort to pitch temp is accomplished the rest of the way using my glycol chiller.
2nd test:
5 gal of boil kettle water : 180°F
HERMs tank water : 75°F (water from hose was warmer)
this time the water from HERMs tank will be pumped through a 12" x 15" 4 core heat exchanger with a 10" cooling fan to cool the HERMs tank water.
5 min: 128°F
10 min: 113°F
15 min: 106°F
20 min: 102°F
25 min: 98°F
30 min: 95°F
Herms tank: 87°F
As you can see the temp of the heated water was cooled 27° cooler with the heat exchanger than without it. Not sure if this is a necessary step, but it was fun to biuld