[Greenbuilding] Heat pump HWS

Antonioli Dan solardan26 at gmail.com
Fri Apr 22 22:51:50 CDT 2016


So where are the numbers?

Are you willing to invest in your own ideas, spend your own money? Report back?




On Apr 22, 2016, at 8:45 PM, Nick Pyner <npyner at ihug.com.au> wrote:

> Ah, now that IS interesting. Because the NSW certification rated heatpump highly, I assumed  the testing was all done. I'm sure this is true from a simple energy standpoint, a COP is a COP, but that is all the energy certification is interested in, and it doesn't reflect the bigger picture.  The controversy I alluded to has been brewing for some time and it all hit the fan with with the release of a Regulatory Impact Statement in 2013.
> 
> http://www.energyrating.gov.au/document/consultation-regulation-impact-statement-heat-pump-water-heaters
> 
> and background
> 
> http://yourenergysavings.gov.au/energy/hot-water/heat-pump-hot-water
> 
> The certification work I do is a minimum standard. I have never needed to call for heat pump. If PV goes in, a plain-vanilla storage heater more than suffices.  I was looking into heat pumps on a job but I found the manufacturer excluded alpine areas over       1000m, and there's me, you guessed it, working on a ski lodge at 1700m.  I subsequently found that Rheem make no such distinction and claim(ed) their included resistance heater was unique. Not true, Bosch have one too.
> 
> I can't see why you would ever programme a heat pump to use electric only. It is only there for backup and should not require human intervention.
> The game seems pretty shambolic.
> 
> Nick Pyner
> 
> Dee Why Beach   NSW
>    
> On 23/04/2016 1:34 AM, Antonioli Dan wrote:
>>  I’m looking into hybrid models that allow you to program the tanks to run on heat-pump only, electric only, and both. 
>> 
>> But with heat pumps now all the rage what I’m looking for are solid numbers, not hypothetical calculations.
>> 
>> On Apr 21, 2016, at 9:32 PM, Nick Pyner <npyner at ihug.com.au> wrote:
>> 
>>> Indeed I have.  I was unsure about raising them because of climate considerations, but the essential principle is the same anyway.
> 
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