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Forum: Solar Heating 11-05-15, 09:18 AM
Replies: 5
Views: 4,899
Posted By Daox
The controller should have logic build into it so...

The controller should have logic build into it so that your tank temperatures do not exceed a certain temperature. The reason for this is that the coolant in the lines will degrade at higher...
Forum: Solar Heating 10-14-15, 11:15 AM
Replies: 19
Views: 12,324
Posted By Daox
1kw of electricity equals 1kw of heat. Its a...

1kw of electricity equals 1kw of heat. Its a direct relationship.
Forum: Solar Heating 10-14-15, 08:11 AM
Replies: 19
Views: 12,324
Posted By jeff5may
Those two can be directly compared. They are...

Those two can be directly compared. They are essentially defined amounts of heat energy. Btu's are also a raw amount of heat. As with all physical systems, the heat you put in is greater than what...
Forum: Solar Heating 10-13-15, 02:02 PM
Replies: 19
Views: 12,324
Posted By bmxeroh
A watt is a watt. They are not two different...

A watt is a watt. They are not two different types of values to be compared. Simply put, it takes more power input to heat with gas than with electric BECAUSE some of the input is lost due to the...
Forum: Solar Heating 10-13-15, 08:03 AM
Replies: 19
Views: 12,324
Posted By stevehull
With different fuels, the number of BTUs,...

With different fuels, the number of BTUs, calories or other energy units would be exactly the same to heat a specific quantity of water up by a number of specific degrees.

However, combusted fuels...
Forum: Solar Heating 09-14-15, 08:28 PM
Replies: 21
Views: 14,173
Posted By stevehull
Let me start again. Assume it is 10 meters...

Let me start again.

Assume it is 10 meters from the lowest level (where the storage tank is perhaps in the basement of the home) all the way up to the roof. This might be two stories total. This...
Forum: Solar Heating 09-14-15, 04:35 PM
Replies: 21
Views: 14,173
Posted By stevehull
If you have a straight shot from the basement to...

If you have a straight shot from the basement to the roof, then each story only adds ~ 5 meters or so for each run (10 meters for the input and output; two pipes). Also depends on how tall each...
Forum: Solar Heating 09-14-15, 04:06 PM
Replies: 21
Views: 14,173
Posted By stevehull
Pipe resistance (and thus the size of the pump)...

Pipe resistance (and thus the size of the pump) is HIGHLY dependent on the diameter (radius to the 4'th power). The length is only a minor contributor (unless you are talking of hundreds of meters...
Forum: Solar Heating 09-14-15, 03:31 PM
Replies: 21
Views: 14,173
Posted By stevehull
If you do a drain back system, you need a larger...

If you do a drain back system, you need a larger and more powerful pump compared to a closed loop. In the closed loop, you only have to overcome pipe flow resistance and not gravity (as with the...
Showing results 1 to 9 of 9

 
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