Do Geothermal Heating Methods need to have back again-up heat?
Write-up by GeothermalHelp.com
This is yet another usually misunderstood topic. Some men and women insist that all geothermal warmth pumps will require back again up warmth during extreme chilly.
Initial lets separate back up warmth from supplemental warmth. Back up heat refers to a way of heating if the GSHP is down and out. It indicates that there is a 2nd conventional source of warmth that is there to consider about if the GSHP is absolutely out of commission for whichever cause. Now that may possibly look ridiculous but I can assure you there are a great deal of customized homes in the rocky mountain west that have equally GSHP systems and a boiler that is sized to take care of the total load.
Supplemental heat refers to a secondary heat supply that can help the operation of a GSHP in the course of peak loads. It could be an electrical plenum heater on a h2o to air heat pump or it could be a small boiler or even a h2o heater tied into a radiant distribution method.
The true answer as to if GSHP’s want back again up warmth has less to do with the GSHP and considerably much more to do with the warmth reduction of the framework area by area and the form(s) of distribution. Rooms that have garage door sized windows and twenty foot ceilings have really large heat damage. We want to meet this heat damage by delivering BTU’s at a fee as quickly as they go away the space If the place has radiant floors we will require to establish how many BTU’s we can produce through the floor. This delivery will count on form of radiant floor (slab, thin slab, staple up, Warmboard and many others), floor coverings, and temperature of warmth transfer fluid (120 F max with GSHP)
If we are unable to supply adequate heat through the ground to meet the need we could believe about incorporating compelled air distribution. This pressured air distribution could have a fan coil that is finding 120 diploma water from the GSHP and this mixed with the radiant may well fulfill the demand. The other answer would have been to boost the temp of the warmth transfer fluid more than 120 F with a standard electricity resource but this has it really is individual issues and limitations.
We are limited to creating the flooring surface temp no hotter than 85 degrees. Hotter than that can lead to difficulties with the flooring coverings and is unpleasant to the occupants of the room. Since of this limitation the “problem” is not that the warmth pump can only generate 120 F it’s that even if it could be hotter we would not want to send hotter than that to the ground. In these situations a boiler would not help the predicament. The answer is adding distribution capabilities.
In summary, a GSHP can be created to provide much more than sufficient BTU’s to match the peak load of the venture. The problem is in delivery of that heat vitality to exactly where it is required and for that there are basically two choices. One is to increase far more distribution ability that is appropriate with reduced temp 120 F max. The 2nd way is to boost the temperature of the delivery maintaining in mind the other restrictions that exist with regard to max temp of ground surfaces.
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