Heat Pumps: the Future of Home Heating technology connections heat pump

by premiprinTERS



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Heat Pumps: the Future of Home Heating

Heat Pumps: the Future of Home Heating

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Heat Pumps: the Future of Home Heating
technology connections heat pump
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คุณสามารถหาข้อมูลที่เป็นประโยชน์มากมายได้ที่นี่: ดูเพิ่มเติมที่นี่

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24 comments

Technology Connections 13/12/2021 - 2:43 Chiều

Hello! Here's a comment with some extra info on efficiency and the metering devices used in heat pumps.
First: my wording on the efficiency drop in the cold was sloppy, and it sounds like I'm suggesting the need for defrosting is the only reason it loses efficiency. It is a reason, but not the biggest one – that's simply that as the outdoor temperature gets colder, it's harder for the refrigerant to absorb heat because the temperature difference between it and the air gets smaller. In fact, in the clip when it was -10°, it wasn't building much frost at all because it was very dry. But that was so cold that the refrigerant could barely capture any energy, which is why its output was tepid. And to be clear, its rating down to 5° doesn't mean it operates at full efficiency at that temperature. That's just the lowest temperature that it can sustain its rated heating output.
Re: metering devices. I still somewhat suspect that the mini-split has a capillary tube and largely because of its cost. It was surprisingly inexpensive (this unit was about $1000, but the smallest units from this same manufacture only cost $750 and are fully capable heat pumps). If you use a thermal expansion valve or similar, you need one for each direction which adds to the system's complexity somewhat. I'd still argue that it hardly does – it is, after all, one or two small components of a large system. But simply reversing the refrigerant flow doesn't work on its own in systems that use these more complex metering devices. They'd need some additional piping and valve work (some such valves were visible in the demo rig) to accommodate two metering devices for each direction of flow.

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Jim Hill-BKK 13/12/2021 - 2:43 Chiều

Air heat pumps have the advantage of continuously circulating air around them, replenishing the heat extracted, not so for ground systems

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Ryan Conifer 13/12/2021 - 2:43 Chiều

Was the gentleman on your shirt from the old Epcot Norway ride???

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David Gallegos 13/12/2021 - 2:43 Chiều

Guys I work on these things , they ARE GARBAGE

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Look after your own bills 13/12/2021 - 2:43 Chiều

Haha just fell of my chair laughing Electricity is 4 times the price of gas in UK Heat Pump don’t get hot enough in winter talking heat ASHP talking Kelvins not Centigrade or Fahrenheit do your sums on that one,why the big propeller to blow cold air on something to produce heat.he drives a BMW they did the same sums.Heat Pumps go straight in the bin rubbish they are,bull shut baffles brains

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The Wide Open Life 13/12/2021 - 2:43 Chiều

In an ideal world everyone would use heat pumps and use gas only tor water heating (in places where a heat pump water heater isn’t practical) but still keeping an old school 3 burner propane heater in the garage for when the power goes out, or if load shedding ever became a problem

The country Where I live there is no piped natural gas and all the electricity is hydro generated, most people that don’t use a fireplace will use a heat pump or a combination of both, very very rarely do you see propane space heating, although a lot of people use tankless gas water heaters

Ideally people would use electric everything due to our hydro generation, but the high price of power dictates that

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The Wide Open Life 13/12/2021 - 2:43 Chiều

Jeez North America is about 15-20 years behind Australia and New Zealand 😂

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Blaze Townsend 13/12/2021 - 2:43 Chiều

Heat pumps are amazing. Mine has a COP of 3.8 which is higher than what you listed. (It lists being made by Blueridge, but it is just a rebranded GREE unit but I think that was fine as it was 400 less than the GREE Sapphire.) I installed our minisplit heat pump because our similarly sized window ac unit was using too much power. I am sounding like a advertisement here, but it is saving us over 400 a year so far with the addition of a inverter style window AC for our upstairs. Not enough time with it used as a heater, to offset our 95% efficient boiler so we only heat the downstairs during awake times, to see if it saves us money overall per month.

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John Anderson 13/12/2021 - 2:43 Chiều

Oh yes, that was when that spineless wimp, Ted Cruz fled to Cancun… leaving Texans to freeze to death in the dark.

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Samuel Tetley Estes 13/12/2021 - 2:43 Chiều

10/10

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Emilio Desalvo 13/12/2021 - 2:43 Chiều

You should also add a line in the credits naming the t-shirt you are wearing…

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LegendaryDaph 13/12/2021 - 2:43 Chiều

Excellent!

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Stanislav BANDUR 13/12/2021 - 2:43 Chiều

it is not so new, I use it since end of 2008 and it was already on market few years then. (air to air, if I could I will change that to soil to air/"faucet" water )

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HiDiHoVideos 13/12/2021 - 2:43 Chiều

OK…but how can we use this to cool down the planet?

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G Lloyd 13/12/2021 - 2:43 Chiều

Your Superman hair sold me on your channel faster than a speeding electron

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Damian Bloodstone 13/12/2021 - 2:43 Chiều

I can't say for all, but when it gets below 34F degrees, the heat pump part no longer works to pump heat into your home. Instead a 1500 watt heating coil in the inside part of the unit turns on as auxillary heat running until it gets the temp you set in your home. I have also seen the best of them freeze up entirely outside and break the radiator/heat exchanger tubes. This all depends on what the temperature is outside. They are great for summer, but can be deadly in winter if it gets below 32F/0C degrees. This is only what I have found with mine.

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Marcus Grande 13/12/2021 - 2:43 Chiều

Often glossed over in heat pump vs gas furnace discussion is the reason I will always prefer a gas furnace over a heat pump — power outages. This past Feb in Texas when power was out for days and for some even weeks, anyone with a gas furnace and a transfer switch or some way to connect a modest generator or battery backup to the furnace was able to keep the house warm. A 1/4 HP furnace will only consume about 400W to run the fans. On the larger side, a 1/2 HP furnace consumes about 800W. There is no way a whole home heat pump can even come close to that. It's more like an AC unit which takes thousands, not hundreds, of watts to run, and has an even higher starting power requirement.

We will never be rid of power outages. Whether it's a snow/ice storm, wind storm, fire, tornado, hurricane, or a cyber attack on power infrastructure, you need a way to keep the critical devices charged, a way to cook, and to keep the heat on in the winter to keep the pipes from freezing and some air moving in the summer. When we lose power I can hook up my battery backups to my EZ Generator transfer switch for my furnace and run for days. I can even run off an inverter on my car. No way you can do that with heat pump.

Now I acknowledge that it's possible to lose natural gas in a crisis. That did happen to some in some apartments in Texas where they were without gas for weeks. But playing the statistics, in 30 years I have never lost gas. In that same time frame I can't count the number of times I've lost power. Lost power just about a month ago due to high winds over a 2 day period.

Even if you have a generator or battery large enough to run a heat pump, it will eat through your fuel/charge orders of magnitude faster than a gas furnace. Sorry, until that problem is solved (which I don't know if it can be), I'm sticking to gas.

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dynomar 13/12/2021 - 2:43 Chiều

Isn't this basically reverse AC?

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Crayfish Craig 13/12/2021 - 2:43 Chiều

As an hvac tech it annoys me that the heat pump used by that supporter isn’t level

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Mike Breaton 13/12/2021 - 2:43 Chiều

Hello from Ontario Canada. I have a 3 ton heat pump and it is all I need to heat 3000 sq feet for all but January and February most years. These things are black magic.

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GravityRoller 13/12/2021 - 2:43 Chiều

At 30:00 with a heat pump being so far out of level, does this condition negatively effect efficiency ?

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Car Guy VA 13/12/2021 - 2:43 Chiều

The heat strips consume 3 times the energy of the compressor. I live in a place where the average winter temperature is 50°. This winter my heat strips blew a fuse and the compressor could not get the temperature inside the house above 68°. So even in this mild climate the heat strips are absolutely essentials to stay comfortable. And those heat strips cost a lot of money to operate! So I bought a smart thermostat and it actually stages use of the heat strips to minimize power consumption. But I still prefer my old heating system in my old house which was natural gas heat and electric air conditioning. My house was always comfortable and it was cheap to do so.

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lawnboy81SMS 13/12/2021 - 2:43 Chiều

Drinking game: Take a drink every time he says “heat pump” lol

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Jacques Chouette 13/12/2021 - 2:43 Chiều

I've lived in many places where the winter temperature didn't usually get below 5 C and the air conditioner doubled as a heat pump. Although you could use the heat pump to heat your home (or the room), it didn't do it all that well and you usually had to have a space heater in the room you were in if you really wanted the room warm. In colder climates where the winter temperature was much colder, you always had some better way to heat the house because a heat pump just wouldn't cut it.

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