Timeline for Why isn't heatpump technology used for solar collector panels and boiler tanks?
Current License: CC BY-SA 4.0
20 events
| when toggle format | what | by | license | comment | |
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| Jan 5, 2023 at 16:49 | comment | added | Bitbang3r | (continued) With R410a, things get ugly. R410a doesn't (usually) run as hot a Freon... so it's entirely possible that naively pumping "hot" water from the tank to a heat exchange could hit you with a "one-two" deathblow... cooling the water you already spent money to heat, and ADDING heat to the refrigerant you're trying to COOL. You could come up with a more complex system (say, only routing cold incoming water to the heat exchange on its way to the tank), but that raises the price... and new r410a systems don't last nearly as long as older systems did, so you have less time to break even | |
| Jan 5, 2023 at 16:49 | comment | added | Bitbang3r | Back in the 1980s, there WERE systems that used waste heat from A/C condensers to heat water (my house, built in 1981, had one). The thing is, hot Freon was always hotter than the desired minimum temperature for hot water, never got hot enough to literally BOIL water, and there were few legal limits to how hot "hot" water was allowed to BE, so it was almost entirely a win-win situation... you could pump random water from the tank to a simple heat exchange, and it only helped the efficiency of both. (continued) | |
| Jan 5, 2023 at 9:07 | answer | added | Robin Bennett | timeline score: 1 | |
| Jan 4, 2023 at 21:39 | answer | added | user13097 | timeline score: 1 | |
| Jan 4, 2023 at 16:36 | vote | accept | Louis Somers | ||
| S Jan 4, 2023 at 16:10 | history | suggested | Peter Mortensen | CC BY-SA 4.0 |
Copy edited (e.g. ref. <https://en.wiktionary.org/wiki/let%27s#Etymology> and <https://en.wiktionary.org/wiki/tap_water#Noun>). Expanded.
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| Jan 4, 2023 at 12:05 | review | Suggested edits | |||
| S Jan 4, 2023 at 16:10 | |||||
| Jan 4, 2023 at 0:34 | answer | added | M Szil | timeline score: 1 | |
| Jan 3, 2023 at 19:08 | comment | added | Ben Voigt | rather my comment meant PV, and PV/T in the question is correct. | |
| Jan 3, 2023 at 18:25 | comment | added | Ben Voigt | Note those links have nothing to do with solar panels -- in fact to incorporate solar into such a system, you generally want to use PVT (which you misused in your question -- solar heat collectors are not based on PVT) to supply the electrical power demand of the heat pump(s). The COP of the heat pump compensates for PVT inefficiencies and the electrical output is flexible to also supply other electric loads. | |
| Jan 3, 2023 at 17:58 | comment | added | Ben Voigt | @LouisSomers: Are you looking for this? hotspotenergy.com/residential-heat-recovery-water-heaters also arcticheatpumps.com/heat-pump-domestic-hot-water.html and achrnews.com/articles/104123-free-hot-water-sure-how | |
| Jan 3, 2023 at 0:16 | comment | added | Louis Somers | @user71659 Thanks, that's actually an answer to this question as well. If only they would scale it down to residential application! | |
| Jan 3, 2023 at 0:08 | answer | added | Phil Sweet | timeline score: 4 | |
| Jan 2, 2023 at 22:17 | comment | added | user71659 | They make something like this. Look up Daikin Templifier. It's a heat pump that takes waste heat from HVAC systems and heats water. | |
| Jan 2, 2023 at 19:13 | history | became hot network question | |||
| Jan 2, 2023 at 12:15 | answer | added | Solar Mike | timeline score: 5 | |
| Jan 2, 2023 at 11:57 | answer | added | Transistor | timeline score: 17 | |
| Jan 2, 2023 at 11:41 | history | edited | Transistor | CC BY-SA 4.0 |
edited body; edited title
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| Jan 2, 2023 at 11:31 | history | edited | Louis Somers | CC BY-SA 4.0 |
edited title
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| Jan 2, 2023 at 11:13 | history | asked | Louis Somers | CC BY-SA 4.0 |