Finally, a heat-pump water heater that plugs into a standard outlet
"first 120-volt water heaters being installed... water heaters act like thermal batteries... tapping into this water heater storage capability through rates and incentives. The latest water heaters, like Rheem’s ProTerra, come equipped with digital communications ports to support more fine-tuned control... Manufacturers typically operate on five-year cycles,” he said. “How can you build trust and act on the market and policy changes that are necessary to give them confidence to move forward?
Related:
French startup uses Hi-Fi speakers to develop eco-friendly heat pumps
https://thenextweb.com/news/startup-uses-hi-fi-speakers-develop-eco-friendly-acoustic-heat-pumps See also: https://www.youtube.com/watch?v=5pvrBUz35MU
Near-Isothermal Stirling Heat Pump technology
http://www.fluidmechanics.co.uk/near-isothermal-stirling-heat-pump-technology/
A New Way to Electrify: Heating Buildings with Ice
https://www.youtube.com/watch?v=HFzngLMLbXs
Airthium: Decarbonized heat and power cheaper than fossil fuels
https://www.ycombinator.com/companies/airthium
Y-Combinator backed Airthium's breakthrough engine aims to replace fossil fuels and decarbonize industrial heat and power generation
https://finance.yahoo.com/news/y-combinator-backed-airthiums-breakthrough-201942587.html Simon Derricutt emailed: "Though they don't say exactly how they get the low-loss heat pump, they do say it's working on compression of Helium. https://en.wikipedia.org/wiki/Ericsson_cycle for the cycle they areusing. Though this will be better than unity efficient as regards heat produced per joule put in, by the time you get to relatively low input temperatures around 300K or less, with output temperatures around 800K, the Carnot efficiency won't be that high anyway so it's getting marginal as to whether you're saving money overall when you take into account the cost of the heat-pump and that it will need replacing when it wears out. Looks to me that this heat pump will have a niche use case, where you have otherwise waste heat at a bit lower temperature than you can use, and you need it a bit hotter to use it. Maybe question as to whether this is a breakthrough or simply a stepwise improvement with better engineering, given that the thermodynamic cycle is from around 1850."
The 'exploding' demand for giant heat pumps
https://news.yahoo.com/exploding-demand-giant-heat-pumps-232351998.html
Chinese scientists bring record-breaking Stirling generator to life while Nasa’s patent stays on paper
https://www.scmp.com/news/china/science/article/3240924/chinese-scientists-bring-record-breaking-stirling-generator-life-while-nasas-patent-stays-paper?utm_source=rss_feed
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