DamonHD Posted February 12 Author Share Posted February 12 1 hour ago, SteamyTea said: Have you seen Mr. HD's beard, she will put up with a lot. (when I visited the IWI was being done and there was a baby somewhere, heard it, never saw it) You haven't seen my hair recently! Baby? I knew I'd misplaced something behind the IWI... (The older one turned 18...) Rgds Damon Link to comment Share on other sites More sharing options...
DamonHD Posted September 3 Author Share Posted September 3 I am on the point of signing up for the next stage of an Octopus heat-pump install, enough to apply for the BUS grant, but it is a bit of a journey, and nothing is cut-n-dried yet! https://www.earth.org.uk/Octopus-heat-pump-journey.html Link to comment Share on other sites More sharing options...
DamonHD Posted October 24 Author Share Posted October 24 (edited) On Monday I had a pre-installation visit to discuss details of trenching and other prep works, for a planned install next month. We often don't put our heating on until December, so I may have already done my last space heating with gas in this house. Consumption has been tiny since April: https://www.earth.org.uk/saving-electricity-2024.html I am developing a scheme for re-integrating the Sunamp and Intasol with the heat-pump DHW which I think might work well (treating the DHW cylinder as if it is a combi in this arrangement, with the DHW cylinder being 1st priority for Eddi diversion/boost output, Sunamp 2nd), Edited October 24 by DamonHD Link to comment Share on other sites More sharing options...
DamonHD Posted October 31 Author Share Posted October 31 Here is the proposed integration: https://www.earth.org.uk/Octopus-heat-pump-journey.html#2024-10-31 Link to comment Share on other sites More sharing options...
DamonHD Posted November 17 Author Share Posted November 17 Modest external groundworks for the heat pump were completed on Friday morning, so it seems this is really going ahead! I have turned off (low-carbon) grid boost to the Thermino ready for the system to be rearranged... Link to comment Share on other sites More sharing options...
DamonHD Posted November 21 Author Share Posted November 21 Internal prep works today including removing the existing cupboard, disconnecting the Sunamp Thermino, and threading round a new T+E from the Eddi heater 2 output for the Thermino in the new control scheme... Link to comment Share on other sites More sharing options...
DamonHD Posted November 21 Author Share Posted November 21 Direct link: https://www.earth.org.uk/Octopus-heat-pump-journey.html#2024-11-21 Link to comment Share on other sites More sharing options...
markocosic Posted November 26 Share Posted November 26 Management of how these are being delivered by Octopus seems to gotten worse rather than better over time @DamonHD - is the crew employed by Octopus or are they over-promising on sales and hoping to backfill delivery capability by subbing out 3rd party installers without a management structure to operate in this manner? Link to comment Share on other sites More sharing options...
DamonHD Posted November 27 Author Share Posted November 27 I don't know. I think that the lead may be independent and the rest employees, judging in part by the branding or lack of on their vans. Link to comment Share on other sites More sharing options...
DamonHD Posted November 27 Author Share Posted November 27 Gas supply is capped, so fossil-free at home (other than me!)... 1 Link to comment Share on other sites More sharing options...
SteamyTea Posted November 27 Share Posted November 27 50 minutes ago, DamonHD said: other than me You a fossil or got gas? Link to comment Share on other sites More sharing options...
DamonHD Posted November 27 Author Share Posted November 27 I'm a fossil - a greybeard that doesn't have long to wait for a bus pass... Link to comment Share on other sites More sharing options...
SteamyTea Posted November 27 Share Posted November 27 5 minutes ago, DamonHD said: bus pass I took a bus 2 summers ago, it was horrible. I think down here, I qualify for a pass. Link to comment Share on other sites More sharing options...
DamonHD Posted November 29 Author Share Posted November 29 Everything seems to be working nicely. I have captured current settings/configuration. I shall do some tweaking over the next few days. Nothing major by the looks of it, certainly less than I had expected. One thing that I wanted to do does not seem possible (schedule/clock AND external call for heat) but I can live without it, as the external call is reasonably well-behaved. https://www.earth.org.uk/heat-pump-16WW-control.html Link to comment Share on other sites More sharing options...
DamonHD Posted December 13 Author Share Posted December 13 I gave a talk last night on how my heating system is developing... https://www.earth.org.uk/home-heat-carol.html Link to comment Share on other sites More sharing options...
SteamyTea Posted December 13 Share Posted December 13 Not sure I understand the last bit about getting an effective CoP of 2 by charging when grid intensity is lower than the mean. Are you using emissions as a proxy? i.e half the emissions is the same as a heat pump's CoP of 2. Link to comment Share on other sites More sharing options...
DamonHD Posted December 13 Author Share Posted December 13 If at some point the current grid intensity is less than half its average over the last week, then I am claiming that filling my storage boots now is the same as (in CO2 emissions terms) using the heat pump with a CoP of ~2 at some random point during the last week. Similarly looking forward a couple of days. We are all aware (eg including @Ed Davies!) that there is some contention about that reading, though maybe less so now that constraining excess renewables for reasons other than transmission is becoming more of a thing. In any case I take very low relative grid carbon intensity (and no drawdown from grid storage, aka "supergreen") to be indicative of abundant low-carbon generation and minimal strain on the transmission and distribution system, so a good time also to fill boots. How should I have worded those paras better in my talk? Link to comment Share on other sites More sharing options...
SteamyTea Posted December 13 Share Posted December 13 1 hour ago, DamonHD said: How should I have worded those paras better in my talk Ask your Dad, he is very good at science communication. Failing that, 1 hour ago, DamonHD said: If at some point the current grid intensity is less than half its average over the last week, then I am claiming that filling my storage boots now is the same as (in CO2 emissions terms) using the heat pump with a CoP of ~2 at some random point during the last week. Similarly looking forward a couple of days. You said what I thought you meant, just needed that extra bit of clarification as you are showing that using one technology, with a CoP of 1, and, in some circumstances be thought of as equivalent to another technology with a CoP of 2. 1 hour ago, DamonHD said: We are all aware (eg including @Ed Davies!) that there is some contention about that reading, though maybe less so now that constraining excess renewables for reasons other than transmission is becoming more of a thing. Yes, this is a problem as we introduce more weather based generation. It is interesting to look at the phase out of coal generation, some days coal only produced into the grid for a few hours. While this looks good on the reporting, those power stations were still burning coal as they cannot go from zero to almost 1 GW in half an hour. What is known as hot spinning reserves or in the case of the zero periods, probably just spinning reserves. Wind is probably, at the moment, doing the opposite i.e. overproducing and has to be curtailed, sometimes, to allow the larger gas plants to reintroduce power in an orderly manner. Link to comment Share on other sites More sharing options...
DamonHD Posted 22 hours ago Author Share Posted 22 hours ago (edited) Our overall electricity demand curve this month up to yesterday shows some successful load shifting for DHW at least: https://www.earth.org.uk/heat-pump-16WW-control.html#2024-12-20 Load profile over 2020-12-01 to 2020-12-19 inclusive, gross and net/imported. DHW consumption spikes starting at 07:40 and 19:10 are clearly visible. Edited 22 hours ago by DamonHD Link to comment Share on other sites More sharing options...
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