[Greenbuilding] Nyle Geyser HPWH - Preliminary Results (was HEAT PUMP WATER HEATER)

Mon Oct 15 17:38:43 CDT 2012

Please keep in mind that an ASHPWH WILL raise the heat load and the annual
heating demand of homes in heating climates if placed with in the thermal
envelope. The amount of the increase will be proportionate to the tightness
and U value of the envelope. The tighter the house and the less conductive
the assembly, the greater the increase in heating demand will be. The
by-product of hot water is cold air.

c

*Christian Corson*
*EcoCor Design/Build*
ecocor.us
chris at ecocor.us
207 930-5088

On Mon, Oct 15, 2012 at 6:13 PM, Richard Garbary <richard6 at gmail.com> wrote:

> Paul:
>
> Thanks for this information. It's a game changer. Putting it on a timer
> will improve efficiency, reduce cycling on and off for small draws, and
> increase product lifespan. Very impressive numbers. I'm checking out where
> are local distributor is as soon as I hit Send!
>
> Thanks,
>
> Richard
>
>
> =====================================================================================
>
> On Sun, Oct 14, 2012 at 11:23 PM, Paul Eldridge <
> paul.eldridge at ns.sympatico.ca> wrote:
>
>> I installed our new Nyle Geyser heat pump water heater earlier today (
>> http://www.nyle.com/water-**heating/geyser-r/<http://www.nyle.com/water-heating/geyser-r/>)
>> and I'm pleased to report that the results are even better than I had
>> anticipated.  It took 1.64 kWh to bring 115 litres of water from 16.7°C to
>> 49°C, with a maximum draw of 672-watts (average ambient air temperature:
>> 17°C, relative humidity: 58%, and total runtime: 2 hours and 57 minutes).
>> It's not as loud as our dehumidifier and it operates at a slightly lower
>> pitch, which I find generally less irritating.
>>
>> If we had an electric water heater as opposed to a side arm the numbers
>> would have been presumably a little better, because some of the heat
>> supplied is inevitably syphoned-off by the feed and return lines that
>> connect the tank to our oil-fired boiler. All in all, not too shabby given
>> that it would have taken 4.3 kWh to do the same job using electric
>> resistance.
>>
>> I ran two loads of laundry back-to-back in our Bosch front loader, both
>> in warm water.  The first load, plus a couple hours of standby tank losses
>> came to 0.42 kWh, and I know from past experience that a similar size load
>> with our small electric water heater would have consumed in the order of
>> 0.90 to 0.95 kWh.  Our second load of laundry used just 0.29 kWh, which I
>> find particularly impressive.
>>
>> I noticed that the Nyle consumes just 1-watt in standby mode (it has a
>> temperature probe that continually monitors the temperature of the tank so
>> that it knows when to turn itself back on); that's welcome news. I've
>> plugged ours into a simple mechanical timer that has a twenty-four
>> push-pull pin wheel, so it's not scheduled to come back on until 06h00, at
>> which point it's free to run for up to two hours before the timer kills the
>> power again; if need be, we'll add a second cycle for the evening, but I
>> expect that once per day will suffice.
>>
>> This is a solidly built and well engineered product and I think it's a
>> great option for anyone who currently heats their DHW with either oil or
>> electricity.
>>
>> Cheers,
>> Paul
>>
>>
>> --- Original post ---
>>
>> Hi Alan,
>>
>> I just purchased a Nyle heat pump add-on to supply heat to the side arm
>> attached to our oil-fired boiler.  It's a 115-volt system that draws a
>> maximum of 800-watts and has a rated heating capacity in the order of
>> 1.8 kW (6,275 BTU/hr). This one can be used with an electric, solar,
>> gas, oil-fired or indirect water heater (the Geyser RO) but there is
>> another version designed specifically for electric tanks (the Geyser R).
>>
>> See:http://i362.photobucket.**com/albums/oo69/HereinHalifax/**
>> Img_1914.jpg<http://i362.photobucket.com/albums/oo69/HereinHalifax/Img_1914.jpg>
>>
>> The cost of the Geyser RO is not unreasonable at $1,150.00 CDN (the
>> electric-only R model is cheaper).  Installation is pretty straight
>> forward and you don't have to discard your existing tank or modify your
>> plumbing.  The fact that it works in conjunction with your existing
>> water heater also eliminates the risk of hot water run outs or sub-par
>> performance in the sense that if your electric or oil-fired water heater
>> can keep up with your DHW demands today, it will be no different
>> tomorrow or the day after, except that the Nyle will presumably take
>> over the lion's share of the work.
>>
>> Another nice thing for us is that the Nyle will supply us with all the
>> DHW that we require (at about one half the cost of a conventional
>> electric water heater) *and* it will provide us with "free"
>> dehumidification.  As it stands now, I run our dehumidifier eight months
>> of the year, seemingly non-stop some days, and so this responsibility
>> will be handed over to the Nyle, in whole or in part (the outdoor
>> relative humidity as I type this is 100 per cent); in effect, we'll
>> receive two services for the price of one.  In addition, we'll have the
>> added benefit of free coolth during the summer.  But what about the
>> winter months you ask?  I'm not overly concerned.  Our home is heated by
>> two high efficiency ductless heat pumps that supply us, on average, two
>> and a half to three kWh of heat for every kWh they consume.  The Nyle
>> will "steal" some of this heat to heat our DHW, but we're still way
>> ahead in that the heat we sacrifice will have been provided to us at as
>> little as one-third the cost of electric resistance.
>>
>> At the moment, our DHW is supplied by a small 70-litre 115-volt/1.38 kW
>> electric tank that was originally intended to pre-heat the water feed to
>> our side arm.  We wanted to minimize the amount of oil that we consumed
>> for hot water purposes and the electric tank did cut the runtime of our
>> boiler by roughly two-thirds.  Then, rather than let the side arm call
>> for heat at will, we decided to limit the boiler's operation to a single
>> ten minute run twice a week, and eventually cut that to once a week.
>> Ultimately, we decided to stop using the boiler altogether, which means
>> that we have to pull enough hot water through the system to offset the
>> standby losses of this larger second tank. Consequently, we take
>> somewhat longer showers than we would otherwise, wash our clothes in hot
>> water and occasionally open up a hot water tap for no good reason; if we
>> don't, the supply temperature falls off rapidly and we experience cold
>> showers. Since we'll be using the heat pump to heat the water stored in
>> the side arm, we can now remove the electric tank from service and
>> eliminate this needless usage.
>>
>> Presently, we use an average of 4.0 to 5.0 kWh a day for DHW purposes
>> and I anticipate that our new Nyle will cut that by more than half --
>> not a huge savings by any means, but still worthwhile from our
>> perspective.  First of all, we'll eliminate the standby losses of the
>> electric tank which at 47-watts works out to be just over 1.0 kWh a
>> day.  Secondly, we'll no longer need to wash our clothes in hot water
>> and can eliminate the other steps we take to prevent the side arm from
>> cooling off.  The additional heating demand during the winter months --
>> perhaps 3.0 kWh per day which translates to 1.0 or 1.2 kWh actual with
>> respect to our two ductless heat pumps -- will be offset in large part
>> by the reduction in runtime of our dehumidifier come spring, summer and
>> fall.
>>
>> I'll have power monitors installed on our Nyle and our two ductless heat
>> pumps and will log this data in a spreadsheet so that I know precisely
>> how much electricity is consumed by these three appliances on a day by
>> day and hour by hour basis.  I'll provide the list with occasional
>> updates once I get the unit up and running.
>>
>> Cheers,
>> Paul
>>
>>
>>
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