I would like to mention that your introductory comments about the effciency of various types of heating is based on a misconception, possibly? You say a gas heater is 85% efficient (modern ones are over 90%) and electric resistance heating is 100%. However considering that elctricity essentially is an energy transporter not a source you need to take into account the energy input to make and transmit the electricity, which is probably about 50% efficient so any electric heating efficiency is essentially half of what you claim. Not only that but the relative costs of gas against electricity is about one to four respectively so makes electrical heating very expensive. I also do not understand your explanation of COP, essentially the heat from a refrigeration unit is that generated by the compressor and the harder it works the more heat there is at the condenser. This is why air source loses effectiveness the lower the outside ambient which if it reaches a temperature equal to the evaporator temperature there will be no output from the compressor as there is no cooling demand. Another unrelated factor is the the government's push for heat pumps instead of gas is to reduce CO2 Otherwise why force an expensive way of domestic heating on an unsuspecting public (Banning of gas boilers in new build houses)? They are assuming a low carbon electrical supply but that is looking very unlikely as the construction of non CO2 emitting generation is slow (You may read that X amount of capacity of wind farms are being built, but the average output from them is about 40% of rated power) and there are the imminent closure of most of our nuclear power stations in the next ten years or so, and who knows when Hinkley point will be finished? With the push for electric vehicles and heat pumps, the grid load must increase and probably significantly and as CO2 emissions are based on demand this is going to increase so the whole exercise seems poorly thought out. The cart before the horse in my view.
Fascinating! I'm building a house and a green building consultant recommended a heat pump. I could not understand how it could work and now I get it! Brilliant! I had no idea that there were anti-freezes that would boils at -26.3˚ C and lower temperatures! Thank you so much.
Would be amazing to have a video on borehole systems, how is the fluid physically transferred, different method of transferring thermal energy, different ways to reject thermal energy (including rejecting water back to a river maybe?) Rising water table in city of london is a good talking point! cheers for all the great vids!
Up until this moment I had no idea really what a refrigerant was. I didn't understand that what made it a refrigerant was the extremely low boiling point. Thank you for this.
For the EER section, I think the US and EU typical rating ranges are flipped. 1 W = 3.41 BTU/h so the US values would be inflated to 11-16, instead of the EU (W/W). Very informative video, thank you!
I installed my split unit. Under my 2 foot overhang on the south wall my house. So in the Summer time it’s in the shade! In the winter it’s in the sun on a dark wall. That really increase efficiency.
Is there a good formula for inputting scop, cop, seer, hspf along with tonnage to compare a furniture with x btu burner.... Of course also adding your local cost per kWh & cubic foot of gas? It seems like it should be pretty simple... X energy in = x btu out
I am a researcher from Turkey working on energy efficient electric heating systems. It is a system that will make a great contribution to meeting the energy needs for heating residential and non-residential buildings (schools, hospitals, nursing homes, places of worship, theatres, state public institutions, sports halls and large shopping malls) and keeping heating costs at an optimum level. In addition, it is a light and portable, easy-to-install system that is 300% more efficient than a heat pump, eliminates the problem of cabin heating and range loss in vehicles, and is much more economical than a heat pump. Mass production of our heating system, for which a National Patent has been obtained and EPO Patent applications covering 37 European Countries have been made. I am looking for an investor for myself. Thank you
Good video but key elements are scop and capacity drop off at lower temperatures. There is a large variety depending upon specification. Check scop and delivery capacity at -7 degrees ambient with flow temp for heating at 45c to make sure you are getting a decent product
Good video. But I was wondering; are you sure, in the imperials coefficents, that the top unit you need to use is the BTU and not the BTU/h ? Because the watt is a unit of power like the BTU/h and the BTU is a unit of energy like the joule.
I bought and installed my 5kw (SCOP of 5) split air to air heat pump for 550$ US and thats include a wifi module to control it. Those prices presented here seems rather high, but for the water and ground source units it seems realistic. I truly don't understand why there units are so much higher in price when they basically is the same unit, just a different heat exchanger attached ....
I live in a 2 story home, about 2K sq. ft. in the first floor and around 1K sq. ft (3 bedrooms) upstairs. I live in South Florida and only use the heating element in my AC just a few weeks a year, so I don't spend a lot on heating. I was thinking about getting a 5 zone Blueridge Mini-Split 21.5 SEER Heat Pump. 1 in each of the bedrooms, 1 in the Family Room and one in the Kitchen downstairs. My office already has a Heat Pump I installed a few years back, since the AC didn't work very well in there. Most nights, just one of the bedrooms is in use, since our Autistic Son at 17, still insists on sleeping with us and most days are spent in the Kitchen and Family room. With this setup, my Dining room and Living Room (which we currently rarely use) wouldn't be cooled. I currently spend around $4-500 a month on my 12 SEER Air Conditioning system. ... If I were to do a setup like this, leaving the existing system for the occasional usage of my unused rooms and mostly just running 1 or 2 zones at a time, would I save a lot on my AC bill?
Thank you very much for the video! Subscribed, looking forward for future videos. I'm planning to build a house boat, which would be located in a non freezing water reservoir in Bulgaria. I suppose the best and cheapest solution would be an open source loop water heat pump, in Your opinion what cost of equipment for a four bedroom and large living room house should I be looking for? I'm trying to estimate the cost of heating, ventilation and AC equipment. Perhaps You could recommend a cost efficient manufacturer? Thanks in advance
If you can choose between air source and ground source heat pump then whats the return on investment ie which is going to cover its install cost sooner assuming a set amount of use and heat generated. Also would air source heat pumps work best in warm climates where outside air can be very warm (30/90s)? Also many water source heat pumps need access to a PRIVATE water source, not sure you can just extract the heat from your local river and dump the colder thermal load back into the water via a heat exchanger? Also if you live in warmer climates would nighttime air temp not be be quite high and thus allow for air source heat pumps to extract heat even overnight? It also seems quite straightforward to dump the excess heat into a water tank so in the morning your shower is not just luke warm.
Ground source cost more to install but repays cost quicker than air cooler overall. All these systems will be using pumps running off your electricity supply so you don't get free energy for free! Well worth considering adding solar panel on the roof and having both systems integrated at the design stage of a new build.
Thank you for your videos. Lately, I have been looking at chiller offers from Sanden, Multiaqua, Daikin (Altherma 3), and Chiltrix among others. They claim to produce heating, cooling, and hot water (except for Sanden which only produces heat and hot water) at very high levels of efficiency using air to water heat pumps. I suspect they all use a reversing valve (except again for Sanden). Some of them claim very high COP numbers. They, also, claim lower costs than GSHP. When I compare long term ownership costs, I find that their costs are usually greater than air to air in spite of having higher COP numbers. In fact, I tend to get confused in attempting to decide among them. Could you cover these types of heat pumps in more detail? Could you, also, please provide an industry perspective of where trends in products (cooling, heating, and hot water) and future (not too far) consumer efficiency is going? Finally, could you provide a single chart providing 10-year total cost of ownership for different technologies (for instance, air to water, air to air, etc).
Anyone know of a database where I can search heat pumps by their SCOP? Energy Star in the US doesn't have SCOP. And my search results for SCOP databases are coming up short
Informative video, and I'm all for clean energy, but I always have to throw a flag on people describing electric power as 100% efficient or 0 emissions. Electricity isn't a power source -- it's just a convenient way of transmitting energy harvested from other sources. Electric power is only as clean or efficient as the original power source.
Do they also manufacture heat pump energy harvest system from the waste water. You know, they flow usually so deep, that the temperature could be lowered like a few degrees without concern of icing. Also waste water is commonly so so called salty, that it actually could be cooled to maybe zero nearly always. And do they make accessory additive system to air-to-air or air-to-water pumping. Like glycol-water, old or spare part car radiator, and circulator pump. To own yard or field to a few dozen centimeters, and there you go, like ground to air; but the investment cost maybe a few hundred euros/bucks. Why heat wells, do not understand. In narrow spaces, vital maybe.
Has anyone tried tapping into the grey water leaving the home? Bathtub/shower, dishwasher, washing machine, kitchen sink? I think a heat pump would love all that waste heat. A grey tank in the basement. Is it doable? Edit: Yes I do understand there would be regular maintenance of any household grey tank with messy cleaning but it may be worth it. I live in Canada. Brrrr
Well here is my heating solution for a small room I bought a harrier air conditioner that is 8000 BTUs per hour it is a 410A unit I paid $5 for it the manufacturer included an extra metal part that held the capacitor in place located underneath the circuit board now it's blew the fuse I purchased a 10 amp fuse the board called for a 16 but it is what was available the unit worked I intend to take a 24-volt contactor and a heating thermostat in conjunction with a transformer and put the evaporator coil to the outside and and set aside the fancy circuit board with its remote and teeny relay that runs on six volts
As a physicist, it disturbs me to see energy in units of kW, which is only appropriate for power. The units for energy are kWh, or kilowatt-hours. It's like listening to concrete contractor speaking of "yards of concrete" needed for a project. We physicists naturally perform dimensional analysis to check validity of our equations and formulas, and, if they don't pass, we consider them bogus from the get-go.
Continuation and we bet more technical and he does censor or mechanical switch that will detect ice buildup on the evaporator coil that will make him break a contact on his low voltage side of the controls to clarify this unit will be a heating only and will run on second hand salvaged control components for which the capacity to make and break current through a switch will be completely Overkill one componentthat I would like to have that may or may not exist would be a digital displayed remote sensing stat that has adjustable cut in and cut out points the temperature and humidity that this pile of crap can safely operate in without icing the evaporator coil over
Natural Gas heat is much less expensive than any type of mini split heat pump. I learned this after days of research. Why? Because natural gas is cheap, even at 85% efficiency, it is less expensive to use. Don't be fooled.
That depends on your electricity rate. Many electric utility companies offer lower rates for heat pump users, and electric rates vary wildly by location.
You've assumed that everyone pays the same gas / electric prices as you but they don't. We removed our gas heater and replaced it with an inverter split system and saved money on heating. Our climate is moderate though so heat pumps are even more efficient.
⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕
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This was worth a cup of coffee (and a subscription). Many thanks.
I would like to mention that your introductory comments about the effciency of various types of heating is based on a misconception, possibly?
You say a gas heater is 85% efficient (modern ones are over 90%) and electric resistance heating is 100%.
However considering that elctricity essentially is an energy transporter not a source you need to take into account the energy input to make and transmit the electricity, which is probably about 50% efficient so any electric heating efficiency is essentially half of what you claim. Not only that but the relative costs of gas against electricity is about one to four respectively so makes electrical heating very expensive.
I also do not understand your explanation of COP, essentially the heat from a refrigeration unit is that generated by the compressor and the harder it works the more heat there is at the condenser. This is why air source loses effectiveness the lower the outside ambient which if it reaches a temperature equal to the evaporator temperature there will be no output from the compressor as there is no cooling demand.
Another unrelated factor is the the government's push for heat pumps instead of gas is to reduce CO2 Otherwise why force an expensive way of domestic heating on an unsuspecting public (Banning of gas boilers in new build houses)?
They are assuming a low carbon electrical supply but that is looking very unlikely as the construction of non CO2 emitting generation is slow (You may read that X amount of capacity of wind farms are being built, but the average output from them is about 40% of rated power) and there are the imminent closure of most of our nuclear power stations in the next ten years or so, and who knows when Hinkley point will be finished?
With the push for electric vehicles and heat pumps, the grid load must increase and probably significantly and as CO2 emissions are based on demand this is going to increase so the whole exercise seems poorly thought out. The cart before the horse in my view.
Fascinating! I'm building a house and a green building consultant recommended a heat pump. I could not understand how it could work and now I get it! Brilliant! I had no idea that there were anti-freezes that would boils at -26.3˚ C and lower temperatures! Thank you so much.
Learn *HOW HEAT PUMPS WORK* here ➡️ th-cam.com/video/QykwWs3L1W8/w-d-xo.html
Would be amazing to have a video on borehole systems, how is the fluid physically transferred, different method of transferring thermal energy, different ways to reject thermal energy (including rejecting water back to a river maybe?) Rising water table in city of london is a good talking point! cheers for all the great vids!
Up until this moment I had no idea really what a refrigerant was. I didn't understand that what made it a refrigerant was the extremely low boiling point. Thank you for this.
i wanted to let you know i love all of your videos. keep up the great work for and thank you for what you do!
Was waiting for. Best engineering channel over youtube ever..... thanks you so much...
For the EER section, I think the US and EU typical rating ranges are flipped. 1 W = 3.41 BTU/h so the US values would be inflated to 11-16, instead of the EU (W/W).
Very informative video, thank you!
I installed my split unit. Under my 2 foot overhang on the south wall my house.
So in the Summer time it’s in the shade!
In the winter it’s in the sun on a dark wall.
That really increase efficiency.
i think your the best and superb than mechanical engineer and architect and designer as well as the best presentation thank you and much appreciated
Is there a good formula for inputting scop, cop, seer, hspf along with tonnage to compare a furniture with x btu burner.... Of course also adding your local cost per kWh & cubic foot of gas?
It seems like it should be pretty simple... X energy in = x btu out
I am a researcher from Turkey working on energy efficient electric heating systems. It is a system that will make a great contribution to meeting the energy needs for heating residential and non-residential buildings (schools, hospitals, nursing homes, places of worship, theatres, state public institutions, sports halls and large shopping malls) and keeping heating costs at an optimum level. In addition, it is a light and portable, easy-to-install system that is 300% more efficient than a heat pump, eliminates the problem of cabin heating and range loss in vehicles, and is much more economical than a heat pump. Mass production of our heating system, for which a National Patent has been obtained and EPO Patent applications covering 37 European Countries have been made. I am looking for an investor for myself. Thank you
Good video but key elements are scop and capacity drop off at lower temperatures. There is a large variety depending upon specification. Check scop and delivery capacity at -7 degrees ambient with flow temp for heating at 45c to make sure you are getting a decent product
Good video. But I was wondering; are you sure, in the imperials coefficents, that the top unit you need to use is the BTU and not the BTU/h ? Because the watt is a unit of power like the BTU/h and the BTU is a unit of energy like the joule.
I'm not sure exactly which part of the video but probably BTU/h was meant
I bought and installed my 5kw (SCOP of 5) split air to air heat pump for 550$ US and thats include a wifi module to control it. Those prices presented here seems rather high, but for the water and ground source units it seems realistic. I truly don't understand why there units are so much higher in price when they basically is the same unit, just a different heat exchanger attached ....
Do manufacturers include the energy used for pumping the water/fluid to the heat exchanger into the energy rating?
To be honest this video feels like it should be the first episode in the series, not a second one.
I woder if you could use a deep well as a water source, like 35 meters deep?
Nice video, nice explanation.
I live in a 2 story home, about 2K sq. ft. in the first floor and around 1K sq. ft (3 bedrooms) upstairs. I live in South Florida and only use the heating element in my AC just a few weeks a year, so I don't spend a lot on heating. I was thinking about getting a 5 zone Blueridge Mini-Split 21.5 SEER Heat Pump. 1 in each of the bedrooms, 1 in the Family Room and one in the Kitchen downstairs. My office already has a Heat Pump I installed a few years back, since the AC didn't work very well in there. Most nights, just one of the bedrooms is in use, since our Autistic Son at 17, still insists on sleeping with us and most days are spent in the Kitchen and Family room. With this setup, my Dining room and Living Room (which we currently rarely use) wouldn't be cooled. I currently spend around $4-500 a month on my 12 SEER Air Conditioning system. ... If I were to do a setup like this, leaving the existing system for the occasional usage of my unused rooms and mostly just running 1 or 2 zones at a time, would I save a lot on my AC bill?
Nice overview, but I think you should have stated whether the values are linear or not and if not to what degree is typical.
Nice summary. Thanks!
Thank you very much for the video! Subscribed, looking forward for future videos. I'm planning to build a house boat, which would be located in a non freezing water reservoir in Bulgaria. I suppose the best and cheapest solution would be an open source loop water heat pump, in Your opinion what cost of equipment for a four bedroom and large living room house should I be looking for? I'm trying to estimate the cost of heating, ventilation and AC equipment. Perhaps You could recommend a cost efficient manufacturer? Thanks in advance
Great videos, love it! What would your suggestion be to heat a shipping container used as an urban vegetable farm in Canadian winter months?
If you can choose between air source and ground source heat pump then whats the return on investment ie which is going to cover its install cost sooner assuming a set amount of use and heat generated. Also would air source heat pumps work best in warm climates where outside air can be very warm (30/90s)? Also many water source heat pumps need access to a PRIVATE water source, not sure you can just extract the heat from your local river and dump the colder thermal load back into the water via a heat exchanger? Also if you live in warmer climates would nighttime air temp not be be quite high and thus allow for air source heat pumps to extract heat even overnight? It also seems quite straightforward to dump the excess heat into a water tank so in the morning your shower is not just luke warm.
aaaaahhhh this guy!!! Give this man a cookie
Ground source cost more to install but repays cost quicker than air cooler overall.
All these systems will be using pumps running off your electricity supply so you don't get free energy for free! Well worth considering adding solar panel on the roof and having both systems integrated at the design stage of a new build.
Plz make videos on firefighting pumps also
Great job... Thank you, I've been looking all over for this kind of information.
Awesome video
When do you make HVAC diagrams, log P - h for some thermodinamic cycles?
That video is left.
and wat about the new heatpumps out of japan >co2 based ones
Thank you for your videos.
Lately, I have been looking at chiller offers from Sanden, Multiaqua, Daikin (Altherma 3), and Chiltrix among others.
They claim to produce heating, cooling, and hot water (except for Sanden which only produces heat and hot water) at very high levels of efficiency using air to water heat pumps.
I suspect they all use a reversing valve (except again for Sanden).
Some of them claim very high COP numbers. They, also, claim lower costs than GSHP.
When I compare long term ownership costs, I find that their costs are usually greater than air to air in spite of having higher COP numbers. In fact, I tend to get confused in attempting to decide among them.
Could you cover these types of heat pumps in more detail?
Could you, also, please provide an industry perspective of where trends in products (cooling, heating, and hot water) and future (not too far) consumer efficiency is going?
Finally, could you provide a single chart providing 10-year total cost of ownership for different technologies (for instance, air to water, air to air, etc).
Thanks
Thank you!
splendid mate !!
So EER has units of seconds? It measures time?
7:50 what if you buried a 5000 Gal water tank under ground (say 20 ft deep), placed 3 feet of insulation on top and used it as a battery?
You missed IEER at the end. But great video
Anyone know of a database where I can search heat pumps by their SCOP? Energy Star in the US doesn't have SCOP. And my search results for SCOP databases are coming up short
Informative video, and I'm all for clean energy, but I always have to throw a flag on people describing electric power as 100% efficient or 0 emissions. Electricity isn't a power source -- it's just a convenient way of transmitting energy harvested from other sources. Electric power is only as clean or efficient as the original power source.
Achivement unlocked: Scenes and SFX
Excellent thanks!
What does he mean by "crank case heating". Defrost or something?
Do they also manufacture heat pump energy harvest system from the waste water. You know, they flow usually so deep, that the temperature could be lowered like a few degrees without concern of icing. Also waste water is commonly so so called salty, that it actually could be cooled to maybe zero nearly always.
And do they make accessory additive system to air-to-air or air-to-water pumping. Like glycol-water, old or spare part car radiator, and circulator pump. To own yard or field to a few dozen centimeters, and there you go, like ground to air; but the investment cost maybe a few hundred euros/bucks. Why heat wells, do not understand. In narrow spaces, vital maybe.
You forgotten to mention that for an open loop you can also use groundwater
I believe that is what he meant with ground heat (vertical holes)
hey man , please we need an illustration of FANs Types thank you
Has anyone tried tapping into the grey water leaving the home? Bathtub/shower, dishwasher, washing machine, kitchen sink? I think a heat pump would love all that waste heat. A grey tank in the basement. Is it doable? Edit: Yes I do understand there would be regular maintenance of any household grey tank with messy cleaning but it may be worth it. I live in Canada. Brrrr
But they have to be switched on 24/7. That is their Achilles heel.
Well here is my heating solution for a small room I bought a harrier air conditioner that is 8000 BTUs per hour it is a 410A unit I paid $5 for it the manufacturer included an extra metal part that held the capacitor in place located underneath the circuit board now it's blew the fuse I purchased a 10 amp fuse the board called for a 16 but it is what was available the unit worked I intend to take a 24-volt contactor and a heating thermostat in conjunction with a transformer and put the evaporator coil to the outside and and set aside the fancy circuit board with its remote and teeny relay that runs on six volts
The American units grind my gears
The °F stands for ''Freedom'' :D
mike_HVAC I love it... we have bailed out the non F guys twice now....
Sir please can you tell me dx system and vrf system are close cycle are open cycle.. Please reply
New VRF unit video here:➡️ th-cam.com/video/4i1XgcP1tmw/w-d-xo.html
7 grand i just bought a 3 ton heat pump on e bay brand new 2 grand !!!!!!!!!!!!!!!!!!!!!!
As a physicist, it disturbs me to see energy in units of kW, which is only appropriate for power. The units for energy are kWh, or kilowatt-hours. It's like listening to concrete contractor speaking of "yards of concrete" needed for a project.
We physicists naturally perform dimensional analysis to check validity of our equations and formulas, and, if they don't pass, we consider them bogus from the get-go.
and it's ZERO outside
Continuation and we bet more technical and he does censor or mechanical switch that will detect ice buildup on the evaporator coil that will make him break a contact on his low voltage side of the controls to clarify this unit will be a heating only and will run on second hand salvaged control components for which the capacity to make and break current through a switch will be completely Overkill one componentthat I would like to have that may or may not exist would be a digital displayed remote sensing stat that has adjustable cut in and cut out points the temperature and humidity that this pile of crap can safely operate in without icing the evaporator coil over
Natural Gas heat is much less expensive than any type of mini split heat pump. I learned this after days of research. Why? Because natural gas is cheap, even at 85% efficiency, it is less expensive to use. Don't be fooled.
That depends on your electricity rate. Many electric utility companies offer lower rates for heat pump users, and electric rates vary wildly by location.
You've assumed that everyone pays the same gas / electric prices as you but they don't. We removed our gas heater and replaced it with an inverter split system and saved money on heating. Our climate is moderate though so heat pumps are even more efficient.
Very difficult to get natural gas off-grid out of a solar panel or windmill, though.
Seen our new video on HOW SOLAR PANELS WORK in detail th-cam.com/video/Yxt72aDjFgY/w-d-xo.html
They might be efficient, but they can never compete with a gas boiler. Not enough heat in the winter when you need it most. Expensive and useless.
Very expensive it all cost to much,