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Thread: Heated driveway

  1. #81
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    Quote Originally Posted by Charlie
    i would fire the caretaker and get a new one
    Lets see now - small town - hard to find good folks to help with things (because the good folks are already busy) - and I really like the guy. I will stay with what I have.
    Brad (a 6288 club member)
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  2. #82
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    Probably only Charlie cares about this - When I was in Maine last week we got one additional thing to work on the melt system. The temperature module has 2 built in relays that can be turned on and off based on temperature - or they can be directly turned on and off through a browser.

    The melt system controller has the ability to use an external unit with a START button to force the system to go into melt mode to pre-heat the driveway. We wanted to use the temperature module relay to trigger the START function. An initial test on Friday morning showed us what we needed - mainly a power source between 24V and 28V. In the afternoon the plumber came with a transformer that produces 24v power. Hooked the power source to the relay and the controller and it worked. The system was in IDLE mode and I was able to force the system to MELT mode by turning the relay on at the temperature module for "more than 4 seconds" then turning it off.

    We had had a 6 inch snow storm that used 15 hours of burner time - for just the storm. The next storm was an 8 inch storm and I forced the system to turn on about about 4 hours before the storm came. For the pre-eat time, the whole storm and the 2 days between the first and second storm, the burner time was a total of 9 hours. This setup is more efficient overall as the snow melts on contact allowing the temperature of the system to stay higher and not have to work as hard.
    Brad (a 6288 club member)
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    http://public.fotki.com/MWO/saved/2012/ MWO image & video archive site 2006-2012

  3. #83
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    with the 8" snow and the 4hr pre heat how long did it run to clear the drive

    how long did it take to get the 8"

    was it the same time for the 6" to fall or less

    if the storm is slow the the system runs more ???
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  4. #84
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    Quote Originally Posted by Charlie
    with the 8" snow and the 4hr pre heat how long did it run to clear the drive

    how long did it take to get the 8"

    was it the same time for the 6" to fall or less

    if the storm is slow the the system runs more ???
    8" snow and 4 hour pre heat - total burner time was 9 hours including 2 days in between the storms. Clock time was a lot longer - pretty close to 17 hours for the storm thru to being done melting + 4 hrs = 21 hours total.

    It is hard to know how long it was snowing. It started around 3am. I recall it ended about 10-12 hours later. the rate of snowfall was about the same as the 6" storm - just a bit longer clock time.
    Brad (a 6288 club member)
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    http://public.fotki.com/bradbradstreet Personal photo web site
    http://public.fotki.com/MWO/saved/2012/ MWO image & video archive site 2006-2012

  5. #85
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    and with the 4 hr pre heat did it keep the snow down good or did it build up some
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  6. #86
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    Quote Originally Posted by Charlie
    and with the 4 hr pre heat did it keep the snow down good or did it build up some
    It kept up with the snow a lot better - which is why the system used less energy.
    Brad (a 6288 club member)
    http://bradstreet.zenfolio.com Personal Photo sales site
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    http://public.fotki.com/MWO/saved/2012/ MWO image & video archive site 2006-2012

  7. #87
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    very good and thanks for all the info about this it may come in handy some time in my job and you have a drive to do something and do the research to get the job done .

    i will soon be doing a school with a geothermal heat pumps .it will have some floor heat with out a boiler to heat the water but uses a heat pump ,don't no how yet but i will soon .

    maybe we can change yours over when i learn how
    i am a Summit Club member
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  8. #88
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    Quote Originally Posted by Charlie
    very good and thanks for all the info about this it may come in handy some time in my job and you have a drive to do something and do the research to get the job done .

    i will soon be doing a school with a geothermal heat pumps .it will have some floor heat with out a boiler to heat the water but uses a heat pump ,don't no how yet but i will soon .

    maybe we can change yours over when i learn how
    We thought about geothermal - and even discussed it again last week. But, the electric costs to run the pumps would be a killer. If I remember right, geothermal would give us 50-55 degree water. To handle a 3" per hour snowfall you need to be pumping 120 degree water (or higher) out into the system. So, you have the same heating requirements. If it were a closed loop system including the geothermal part, you would be cooling the water as it goes through the ground. So, for this type of system I am not sure it makes sense.
    Brad (a 6288 club member)
    http://bradstreet.zenfolio.com Personal Photo sales site
    http://public.fotki.com/bradbradstreet Personal photo web site
    http://public.fotki.com/MWO/saved/2012/ MWO image & video archive site 2006-2012

  9. #89
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    Quote Originally Posted by Brad
    We thought about geothermal - and even discussed it again last week. But, the electric costs to run the pumps would be a killer. If I remember right, geothermal would give us 50-55 degree water. To handle a 3" per hour snowfall you need to be pumping 120 degree water (or higher) out into the system. So, you have the same heating requirements. If it were a closed loop system including the geothermal part, you would be cooling the water as it goes through the ground. So, for this type of system I am not sure it makes sense.

    this is the first time doing the geothermal system ,we went to a school on it but it did not teach us about making hot water from it . so by the end of may i will know how and will keep you in the loop .[ in the loop ,i made my self on this one ]
    i am a Summit Club member
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  10. #90
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    Brad,

    It looks like you have had a great year to test out that heating system. I hope it is working out as well as you had hoped. I was looking at it this morning and I see it's clear and dry.
    Steve
    Is there really any BAD weather???

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