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

Mon Oct 15 17:13:55 CDT 2012

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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