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flannelmaster9 t1_iu1dqf7 wrote

Reply to comment by Dragonfly_Select in The inside of an Electric Vehicle Charger. by rcmaehl

That's all done with a reversing valve for mini splits. I know geothermal exists but have only seen it in rural areas. I don't have enough space in my yard to trench up for the loops. I also live in a region that can be sub zero for a few weeks. -20 is probably the coldest I've seen minus windchill. I've only seen one oil burner in the wild and it threw me off being in the middle of a metro area I've serviced for years.

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Dragonfly_Select t1_iu1xuel wrote

Yeah, cold urban areas are going to be a bigger challenge. Someone in my old neighbor did drilled geothermal. It doesn’t take much space but you need a ground scan to make sure there isn’t anything problematic in the way.

For cities there is talk of effectively reviving steam heat loop systems except this time built around heat pumps. Basically using the existing natural gas right of ways to provide room temperature recirculating water from a centralized source. Denmark is experimenting doing this with waste heat from data centers and other industrial processes.

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flannelmaster9 t1_iu1yhlc wrote

Detroit steam works still heats numerous buildings downtown, I doubt it's effective as Denmark.

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Mungologist t1_iu200kz wrote

It's done via reversing valve for all heat pumps.

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