I bought a Heat Pump

Reed_Richards

Verdigris said:

I'd put PV, rather than thermal, on any spare roof space, personally. Combined with a battery it's much more adaptable.

I'm inclined to agree but I did read that solar thermal was less sensitive to the angle at which the sun hits your roof so might be less dependent on tine of year than solar PV.

Meatballs

https://youtu.be/SfgTOcclbCY

ccbrowning

Meatballs said:

https://youtu.be/SfgTOcclbCY

This sort of guidance is valid for all heat pumps, right? I see a lot of ASHP info and threads but have a GSHP. Overall the way they work is very similar of course. 

QrizB

His presentation style riles me; I couldn't watch the whole video.

I will have to try to watch his zoning video and see him explain why heating more house than you need to will somehow save you money.

Cardew

Reed_Richards said:

Verdigris said:

I'd put PV, rather than thermal, on any spare roof space, personally. Combined with a battery it's much more adaptable.

I'm inclined to agree but I did read that solar thermal was less sensitive to the angle at which the sun hits your roof so might be less dependent on tine of year than solar PV.

I believe the opposite is correct; but stand to be corrected. For solar thermal it is the heat of the sun that is the important factor.

I have been looking back on some posts I wrote 11 years ago. e.g.

'If you want an unbiased report on solar thermal read this Government sponsored trial.

Have you seen this exaustive trial of 8 systems carried out for the Dti at Cranfield? *

http://www.dti.gov.uk/files/file16826.pdf

*
For those not conversant with the units used!
For the 8 systems tested(evacuated Tube and Flat plate) the annual output ranged from 3440 MJ(megajoules) equal to 955kWh to 4,820MJ(1,339kWh)
However from that total had to be deducted the ‘parasitic’ energy to run the pump and electronics. This ranged between zero and 390MJ(108kWh) pa. This of course is daytime rate electricity.
The average for the 8 systems was just over 1,000kWh per year.

So 1,000kWh per year.

Look at the results for the output each month. When you need heating, solar thermal produces energy worth pennies.'

The report is now archived on the Government website, but can be still viewed if required..

I wrote in another post that the best system(Navitron) in the trial produced hot water worth only £1 for the whole of January.

Verdigris

QrizB said:

His presentation style riles me; I couldn't watch the whole video.

I will have to try to watch his zoning video and see him explain why heating more house than you need to will somehow save you money.

I did manage the whole thing (drink had been taken) but I agree the presentation style is somewhat intense. However, I think the content is valuable and rewatching with the pause button and a notebook would be worthwhile. (or find a text version of the content)

Reed_Richards

Verdigris said:

I did manage the whole thing (drink had been taken) but I agree the presentation style is somewhat intense. However, I think the content is valuable and rewatching with the pause button and a notebook would be worthwhile. (or find a text version of the content)

What he said (at great length) about the importance of Weather Compensation is certainly true.  I wonder if @shinytop saw this; he certainly seems to have followed the recommended procedure at some time in the past. 

What I call Load Compensation the Geek calls "Advanced Weather Compensation", which I don't like; it's a different thing and nothing to do with the weather (so here I out-geek the Geek).  And that "more is less" throwaway at the end I don't buy.  I suppose I will have to find and watch the full video on that but I don't think I can take more than one a day.

Meatballs

All of the negatives about the presenting style, just wondering does everyone watch videos at 1x speed? Pretty much all my YouTube viewing is done at 2x speed so didn't notice anything particularly annoying 😅

shinytop

Reed_Richards said:

Verdigris said:

I did manage the whole thing (drink had been taken) but I agree the presentation style is somewhat intense. However, I think the content is valuable and rewatching with the pause button and a notebook would be worthwhile. (or find a text version of the content)

What he said (at great length) about the importance of Weather Compensation is certainly true.  I wonder if @shinytop saw this; he certainly seems to have followed the recommended procedure at some time in the past. 

What I call Load Compensation the Geek calls "Advanced Weather Compensation", which I don't like; it's a different thing and nothing to do with the weather (so here I out-geek the Geek).  And that "more is less" throwaway at the end I don't buy.  I suppose I will have to find and watch the full video on that but I don't think I can take more than one a day.

I just watched it; preaching to the converted!

What he described is exactly what I've done and as I've said before, it works well.  I now have my heat meter working so can monitor COP.  This was yesterday. The outside temp line goes from about 8 to 5 deg.  You can see how closely COP follows temperature. The LH scale is cut off; it's 0.25kW per division so the COP 5 line = 1.25kW.

shinytop

Meatballs said:

All of the negatives about the presenting style, just wondering does everyone watch videos at 1x speed? Pretty much all my YouTube viewing is done at 2x speed so didn't notice anything particularly annoying 😅

Ha, I never thought of doing that.  Much better!