The Real Reason Tesla Developed The Heat Pump!

The Real Reason Tesla Developed The Heat Pump!

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[pamgyang]

$0.3T is $300 billion, cost for the heat pumps, not $30 billion. Still an economically okay cost in comparison.

[riznrik]

Great video, thanks for explaining things as you always do. I believe there's an error at @2:50, 0.3 Trillion should be 300 billion rather than 30 billion.

[philnichols]

I am a retired consulting mechanical and electrical engineer. During my 52 years of consulting I designed innumerable heat pump systems. I was very active in the early years of geothermal systems in South Dakota, working with utility companies and also architects. I gave up geothermal systems for commercial buildings due to the potential for inaccurate diagnosis of ground thermal properties ( which led to one of my fellow consulting firms design a high school that would not stay warm ). So, geothermal is good, so long as it is successful (duh ). Here in western South Dakota we can sometimes experience sub-zero temperatures, down to minus 20 deg. F. Depending on the quality and design of the heat pump system, you could see the unit running at a thermal efficiency of 1 to 1. This is far from the efficiencies of 4 to 1 at 40 to 50 degrees outside. Also, the total run-time hours in very cold climates is greater, leading to a shorter overall lifespan. My wife and I have four Daikin high-efficiency heat pump systems and one York nominal efficiency system. We also have one "pump and dump" geothermal system that is a water to water system, utilizing a water well for supply and the nearby river for discharge. This system produces approximately 115 degree heating water that supplies baseboard finned heating units and in-floor heat for our sun room. All of these systems are more expensive than typical gas heating systems, but are environmentally friendly. They also add compliment our solar panels and our Tesla Model 3.
As usual, you did a great job of explaining how you can get heat from the outside air. My warning to people is to be careful who installs and sizes the system, an good they are. PN

[macrumpton]

The heat pump in Teslas performs a number of temperature regulating tasks. It would be interesting if a device designed for the home could combine the functions of a water heater, refrigerator and air conditioner/heater. If you think about it, it's kind of nuts that we have one box that we use to pump heat from inside the house outside and another that we use to pump heat from a box containing food and pump it into the house.

[balaji-kartha]

The beauty about Elon's strategy is, for every problem find a simple solution that can be mass produced! His vision is always so gigantic that it is awesome!

[moseboy]

Modern refrigerants have solved the ozone depletion problem. However, current generation refrigerants used in heat pumps (R-410a, R-32, etc) still have a Global Warming Potential (GWP) that are hundreds of times greater than CO2. If your HVAC system catastrophically leaks out, you've more or less blown your entire carbon budget for the year. Therefore, high quality workmanship when installing a minisplit heat pump is critical. Upcoming generations of refrigerants will solve this problem, but they aren't at commercial scale yet.

[bartschrodernz]

In New Zealand, about 40% of homes use a heat pump. All new homes have them. Still some way to go though! Off course all heat pumps do both heating and cooling. We use them in our Ski Lodge with outside temps down to about -12 deg C, and they still work fine.

[mikechan]

Heat pump heating/cooling systems have been taking over the HVAC market on new construction for years now— even before Tesla started talking about them.

[eduardovinhasdesousa]

I am a retired HVAC engineer in Portugal and I believe we can always increase efficiency sometimes by adding small changes and approaches. Let's keep our minds open and never be comfortably resigned that we achieved the peak of perfection.

[aftonline]

I think that the best way to explain a heat pump is to think of how your freezer gets warm at the back when it is running, and just imagine that by running a heat pump you are reversing that, and essentially making the outside air even more freezing cold than it already is, while making the inside of your house warm. You are turning the outside of your house into a deep freezer compartment. Because the amount of relatively warm air out there (compared to a deep freezer) is practically infinite, you are never going to run out of heat to warm your house.

[CBeezyDSGB]

Ac technician here… heat pump tend to freeze up at the condensing coils in outdoor temps below 32 degrees. So outdoor unit must defrost every 30/60/90 minutes if the outdoor coil sensor is triggered (depending on board program). Defrost operation means the hot refrigerant goes to the outdoor coil to thaw the ice but the cold refrigerant goes inside. This means the cold air will blow out of your vents in heat mode. To compensate the cold air. Most heat pumps engage auxiliary electric heater elements to provide heat at that point. Heater elements draw a ridiculous amount of electricity compared to a heat pump.

So my point is if we are still burning fossil fuels for our general power grid then the emissions are not going away they are being transferred to the initial power station that is having to create more energy to run the electric heaters. Most gas furnaces are 120v and hardly pull any electricity

[gerryowen]

I have installed a number of mini-split heat pumps and I am impressed with their efficiency. I was surprised to see how the rest of the world has been so far ahead of North America in adopting this technology. My current favourite is the Fujitsu LZBS line. I expect Tesla's engineering can improve on an already-great product. Yes, community-wide where I live a concerted heat pump installation program has made a significant difference in home heating energy here on the Gulf Islands on the West Coast of Canada.

[SandyMcClintock]

We installed two outside Reverse-Cycle heat pumps (with 8 indoor fan units) when we built 12 years ago.
We are very happy the setup and would do it again.
The cost of heating is roughly the same as buying split wood for a slow combustion heater. (AU$270 per 1000 Kg of wood)
Something to consider is the amount of electricity used by the system when in stand-by mode. It seems to use about 2.5KWh per day just to run the electronics (Heating and cooling NOT used). Where we live in Australia that adds up to:
2.5KWh * 365 days * $0.40 = AU$365 per year (US$255 per year). Thats over $4000 in 12 years.

[davemarsh]

Heat pumps YES - but only with quality insulation in our structures

[leonid]

Our house is heated by the heat pump and works just fine, but only till -12°C outside (and in Montreal it reaches sometimes till -30 and even lower during winter); then switch to an electrical furnace. The only heat pump that could function below -12 is Mitsibishi (as I know) and the cost is much higher.

[brettster]

This video is well done, it does not talk about the simple reversing valve required to cool the interior instead of only heating, this is the wonder of the heatpump.

[toddsmith]

I hope this happens sooner as opposed to later. Would love to see a heat pump line at each gigafactory.

[ramblerandy]

That was one of the best explanations of how a heat pump works that I have come across. I'm going to share this with a few people to see if it shifts their confused view of heat pumps. I find that so many people still don't get that heat pumps are not about extracting hot temperatures from outside to inside. I get the answer so many times - "they only work properly when you don't need the heat". WRONG. 😀

[Chriko_labs]

Heat pump engineer here! Heatpumps do create heat, they don't just move heat from one place to another. When the refrigerant is compressed by the compressor motor it turns some of the energy (electricity) into heat. That heat energy then moves with the other heat, that was captured at the evaporator end, to the condenser side where it is transferred into the space/medium that you want to heat. It all depends on the efficiency of the system. A good air to air system gets to a COP of around 4, meaning it produces 4 times more heat energy than it needs electric energy.

[dewpanic]

First, interesting video. Second, (minor error) .3T is 300 billion