DIY Air to water heatpump first test run
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- Опубликовано: 21 июл 2014
- First bench test for my diy heatpump, in side the blue container ther is 100 liters of water. With the following data i can calculate the COP of the heatpump.
DT = 20 degrees
Mass = 100 liters
C = 4180J
PW = 0,528 kWh of used electricity
Q = M * C * DT = 100 * 4180 * 20 = 8360000 joule
E = 3600000 * 0,528 = 1900800 joule
COP= 4,398
Overall a very impressive test run. 
Наука
I was working on this system nearby 10 years before, (when i was student in university) but i was living in Iran and nobody care about it in that moment and i was very young to do it by myself. Now, im happy to see this thing...
This video inspired me to build my own so I did and 5 years on still produces our hot water
How did you calculate what size of heat exchanger is needed to replace the indoor split unit?
Hi. Any pics? Regeres jesper
well done mate. great work, great showing of different values. cheers
I bought a 15 foot pool this summer and got two of these mats and they make a huge difference. We're only 2 days in and I can noticeably tell the difference!!!
wow what a great explanation on how it works!
I following your thread and have to say I am utterly impressed. Now comes the question. Do you have a parts list somewhere handy? I have renovated and built my own house, and now going to do this.
Great video!
well late in the game Stef....did you put the unit into service? What did you end up with for temps in the condenser and tank? I think you mentioned somewhere that you were planning to use for floor heating?
Hi Stef, if i could ask a question - as you simply short solar loop ports and you let the original metering device - capillary tube at its place, do you have some experience with superheat and subcooling values? I se, you have refrigearation manometers, so you probably have some data. Now, i am building similar simple system like you, but i calculated resistance of indoor casette unit and i decided it is not a good way to simply replace indoor air unit by low-drop heat exchanger. I should add some restriction, maybe additional capillary tube.
Next, did you consider defrost cycle? Do you have your own control algorithm?
Thanks
Intresting project you got there, care to explain how the solar panels connection is between the refrigeration unit?
Hotgas>waterheater>solarpanels>evap?
great work :)
This is very cool. Is that just an old ac unit? do you have the hot side going directly into that flat plate heat exchanger? Would like to use a DIY heat pump to trickle heat into a thermal store. I have access to year round ground water that is still 10degrees in the middle of winter which I could use, but I'm not sure it would be any more efficient?
Where do you get the parts to build such a system? I have a few ideas I wish to mess around with but have no idea where to get parts or how to build a heat pump.
where did you get all these parts from? Looks pretty great!
Hi Stef, congratulations on your project.
I wanted to know if the machine you used is the ON/OFF type or is it with Inverter technology?
thank you.
hello. I asked for one bit of the compressor.
compressor run to a certain temperature range. it stops and error system air pressure is high due to the heat sink fails.
eg, the maximum temperature is 60. system only runs on high heat, then the error is always 51.52. whether diehn pressure and telegraph line stability. you help me okay
Hey. Nice job. Could you please tell us the model number of the heat exchanger you are using?
where do you find the ''hoeven'' heat pump air to water exchanger ??
What is the name and model of the compressor?is it running straight of the plug?
How do you calculate how much R134a you need in the system?
@Stef does the outdoor unit just turn on as you plug it in, even without the indoor unit connected? Or is it hacked?
Гарна робота! Теж планую зібрати тепловий насос для басейну. Який фреон використовуєш? Маю зовнішній блок на r410a, а теплообмінник на робочий тиск до 16 bar. Думаю, може заправити його r22?
was it a mini split at first? Thanks! Looking to do similar for spa
Great design, are you using it to heat your home, your hot water or your pool?
Is it an Air to Air henter pump conversion? Do you have a schematic drawing of your setup.
the speed of fan is not too slow, or it's the problem of the camera?
The sucktion coil is to short 3meters i think is the best long distance for r410a to the heat excangero
Tell me how to regulate the temperature of the freon flow or water flow from the heat exchanger? Is it possible to somehow influence this?
Use a DC pump to pump the water, they use much less electricity. An AC pump is a good water heater in itself. I wonder how much heat in the water came from the water pump and how much came from the AC unit? I doubt you are seeing much of a temperature difference across the heat exchanger in which you could easily use a smaller pump.
What exactly are you doing?
do you still have that machine in your garage? do you still use it ?
I just did this and it worked!
Hi!
As I see, you are using an outdoor unit of a split system AC. And you are using a plate heat exchanger as an evaporator. I have a few questions though. Is there an expansion valve, or are you just feeding the liquid directly into the evaporator? What are the readings on pressure gauges? How much pressure is optimal for LP and HP line if the unit is working under full power?
Thanks for sharing the knowledge, mate!
hello, sorry for the late reaction.
This was only a test setup, at this moment the system is integrated in our central heating system.
It already have proved it self wen the outdoor temperature was starting to drop and i keep the temperature in side really nice.
Before the refrigerant flows in the outside coil it goes tough a capillary tube.
On this page you can find more information about this project in English :
ecorenovator.org/forum/geothermal-heat-pumps/3746-first-heatpump-project.html
stef
Thanks to your inspiration i finally build a working air/water heatpump to heat the floor in my living room :)
I had some problems last year with a small on/off unit which was leaking. But this year i bought a 12 year old inverter pump to which i connected a coaxial heatexchanger. It is controlled by an arduino running a PID loop.
did you store hot water in a tank or directly circulated the floor loop with the heat exchanger? which is more efficient? to store hot water in tank for later use or directly heating the floor?
@@MrPokharel123 You would need a buffer, because the thermostat will turn on/off too frequent. I use a 200 liter tank.
@@hollensted would the frequent on off have a negative effect?
How did you calculate the heat exchanger dimensions?
@@rodon91 I didnt. It was salvaged from an old heat pump.
Did you test how much power this used before you converted it to water cooled for a comparison?
hi Stef! Very cool! what is the water output temperature at the egress of the heat exhanger? I'd love to use this as a replacement / helper to my gas boiler for whole-house heating. Ideally have this running most of the time and only use gas as a "boost". Thanks!
For a while house just get a heat pump.
AC units are also small heat pumps , enough probably to hear water as well. But for a while house you need lots of calories , so you can directly buy a big unit. The same thing, with all fittings etc
@@kostas8969 the problem is here a heat pump is probably 10 times the cost of a gas boiler. They are priced utterly ridiculous.
Makes me wonder how hard it would be to build a heat pump water heater with a tank and a cheap mini split system
dear is possible iverter air to air converter air to water use homme water heat thank???thanks best regards
gooood brooo
Would be keep to see a longer test on this sort of system. your high COP is due to A) higher ambient due to running in the day (higher differential between evaporator temp and the ambient air it is scavenging from), and B) the temperature differential between the condensing temp and the water. As the water heats further the COP would drop. R410a in domestic generally maxxes out at around 55-60 degrees condensing, so the warmer the tank water gets the more electrical energy you have to use to get it higher and higher.
Having said that, having what looks to be under 400 initial investment makes this still cheaper over the life of the system than buying a system manufactured for the purpose
How to go about in sizing the condendensing heat exchanger that replaces the indoor unit?
How kW consumes per hour for every liter of water
hi, how much for heat exchanger ?
Respect!
Hoi, gaaf ding! Heb je ergens een webpagina hoe je hem gebouwd hebt? Er wordt hieronder naar inplix verwezen maar daar kan ik het niet vinden. Dank!
dankjewel, die inplix is allemaal spam... hier kan je wat info vinden: svitterzon.nl/?page_id=63
Hi stef. I have been thinking about this set Up for for time.
I have a couple of quistions .Hope thats ok.
How do you control the temperature set point.
Is IT a inverter compressor, and are you using the sensors from the indoor unit to control the set point. And if the inverter should run 50% -100%.
Did you had some issues regarding error fault since you dont have ude the indoor unit?
Anders
Its a on/off compressor it has no inverter technology. Its an old school outdoor unit.
Put the outdoor coils in a small greenhouse.
Wich gaz do you use ? R134A ?
System uses r410a
Hello, Im very impressed with this. I had been looking at using a fridge coil to heat some water then a heat pumo to raise its temp. Then i came across this. Do you have a link to an actualy explination and the full project parts.Thank you
+Raymond Darling here is a link to my build tread on the ecorenovator forum.
ecorenovator.org/forum/geothermal-heat-pumps/3746-first-heatpump-project.html
thank you kindly. I will have a look at that.
hi Raymend, we sell heat pump. send me your email and i send you our e-cataloge
Hi there.can you please tell me the model of the heat exchanger.and how many kw of heating power it has .tnx and how efficient is the DAIKIN unit.have you finished testing
+Goran Vasilevski www.ebay.de/itm/Plattenwarmetauscher-Split-Klima-Heizung-Pool-45-bar-R410A-R407-Bordel-12000-BTU-/360661925244?hash=item53f9203d7c this one i am using. I never finished the daikin project sadly. I bought my self a KS50 heatpump.
@@Svanitterzon hello Stef, I am working on the same project for à low température floor heater. The eBay link is not working anymore, coud you please give us the heatexchanger model or size ? Thanks in advance.
The plate heat exchanger works ok with freon?
Yes this exchanger is made for working with freon. it also have two flare connections on it and two 3/4 inch treads just for the water connections.
Stef van Itterzon hai . I'm want WhatsApp number ? I'm form Malaysia
It would’ve been good if you had of mentioned what your tutorial was about I understand it’s making Eva water out of air for cooling water out of air???????????????
Your efficiency will probably be a bit better if you put the hood back onto the ac outdoor unit. Then the air that the fan sucks in wil actually be the air that flows through the condenser and not around the fan itself.
The condenser should be the evaporator to heat water. You want to absorb heat from the atmosphere and deposit it in the water. You don't understand the concept.
@jameskarrie298 The outdoor unit is the evaporator in heating mode. The hot compressor discharge vapour to water brazed plate exchanger is the condenser.
it work a lot better with the cover on the outdoor
What do you mean by that?
@@filipmisevski676 without cover the fan isnt as effective because it draws air from around (e.g. the open top) instead of sucking it through the exchanger.
Where does that energy go to? I mean, I know it's lost as heat but is the heat produced where flow gets restricted?
+NutsandGuts In a heat pump like this, the compressor compresses the refrigerant which gets hot due to higher pressure (simplified explanation). This is where the heat is removed. In this case, in the heat exchanger.
+Solomon Parker I know that, what I mean is; what happens to all the electricity you put in to the compressor?
+NutsandGuts Electricity isn't a thing that you can put one place or the other, like say gasoline. Electricity is simply the flow of electrons. Every electrical device needs two wires, essentially an in and an out. The electrons flow in and out. The work is done by what they do in the middle. In this case, the flow of electrons causes magnetism which is used to turn a motor which turns the compressor. The energy transferred by the movement of electrons is converted into motion (the compressor) which moves a phase change substance (the refrigerant). The refrigerant moves heat from outside the water to inside the water, which is how a heat pump can be thought of to be more than 100% efficient. In a normal electric water heater, a heating element resists the flow of electrons generating heat, so 100% of the energy delivered by the electricity generates 100% heat. In a heat pump, 100% of energy delivered by the electricity to the pump delivers 200%+ energy into the tank.
Am I being clear enough? I'm happy to answer any questions.
@@NutsandGuts heat pumps essentially just move heat from one place to another by compressing, condensing, and evaporating the working fluid/refrigerant.
Alot of the electricity consumed ends up in the water (but does it much more effeciently than a resistance heater, around 3x so give or take).
The rest of the power goes to condensing water vapor from the air on the evaporator side, some gets dissipated as heat and noise from the compressors, pump, and fan.
U should close the condenser covers for better efficiency
what is the max temperature for heating water ? ( max temperature of water ) . Thank you :D
what happend if i paint extern radiator in black and i place it in the sun ? the temperature for heating up ? o_O
55 C
it seems like near 700 watts in straight heat would do the same.
Must be hard to get an efficiency to match the commercial units, and given the cost of electricity, isn't buying a professionally made unit going to be cheaper in the long run?
maybe if you don't understand
don't comment
It seems like a legitimate question. Perhaps if you don't understand it, don't make a rude reply
maybe if your not a Refrigeration Engineer then shut the fuck up ! because i am
I'd be mad too if my last name was fart.
They say you canèt fix stupid. Your proof of that.
Can I use
r22
Not without significant effort bc the mini split is all electronic and pressure programming variables based on 410a
Great, Great video. I would like to contact you. Thanks for your job.
you are heating the water while using your AC unit to cool the air? that's what this experiment is about?
That is what a heatpump should do yeah. What about it?
hell dig a hole in the base ment and keep on digger put in a liner and use it add heat to your home.
should place cover on the unit
How odd. Someone said this was the best explanation they'd seen. No explanation was given. The camera moved too quickly from object to object to be useful. The ambient temperature was not shown. I could show you my car running but that would not explain how it works. And as someone pointed out an AC pump could be doing all the heating for all we know. Don't get me wrong as a video showing what someone had put together from various unspecified parts it's perfect.
If a swimming pool is in the yard and solar panels on the roof you can heat the pool and cool the house at the same time for Free
this means you used 0.528 kwh electricity to make 100 liter of water 20 degrees hotter ?
Yes
Where do you get 100l? It looks like 240L ton which might be 1/5 filled (difficult to see, just my view) so 50L and while regular heating with 700 watt would take 1,5 hours a COP from 3 looks still good for this setup
😂👍🏻
Lovely video, any idea what you just showed us ? It appeared to be a running system of some sort. That appeared to be water temperature and some electricity. It also looked like a nice day. There also appeared to be a small water leak.Do you know how or have the ability to speak ? That would probably have helped people maybe understand what I'm the world you were doing.I'm an HVAC tech and have been one for 29 years, i could MAYBE guess what you are doing. If you can't speak any known language then maybe write it down and show that to the viewers.Again, lovely pictures of a machine in a yard.Think about what you want people to learn or observe from your videos.
I'm not a HVAC engineer, and I can tell that this is a test of an air source heat pump made from an old air conditioner. Its COP is pretty good, so its clearly a successful test. Not sure why you are having trouble understanding it tbh
@@davidball1924 you know more than me, but unless he specifically made this video for you, then I agree with
Imonlyhalfnuts really - this doesn't help near the number of people if he had just added some basic narration of what the hell he just did...
@@TheJakeRobinson my comment was really aimed at the self proclaimed 29 year experienced HVAC engineer. I agree, some narration would undeed help those that can't work out what they are looking at
With Avasva plans doing something like that was easy.
So with the ration of 4 to 1 if you have some sort of engine to generate electricity using a cold and a hot source which is say only 50% efficient you should get free energy with this device.
??????
This video is kinda old now. Has anyone improved on this or anything? I have always thought it was stupid that we pay $$$ to air condition our house WHILE THROWINGaway that HEAT to the OUTDOORS while PAYING again to HEAT WATER to wash with! That heat could be used to heat a pool, or preheat water for washing with
How about a follow-up video or voiceover on this one to explain what the heck I'm looking at? I think I do but then the math is beyond me... a layman's explanation would make your video relevant... right now you're only preaching to the choir... What are the benefits, how hard would it be to integrate to an existing system? and many other questions I bet many other people are thinking... don't leave us hanging...
Instructions from the Avasva site are perfect for beginners.
&5
Speak up DUDE!, are you a deaf mute? Explain yourself!
AL the info about my project can you find on ecorenovator.org/forum/geothermal-heat-pumps/3746-first-heatpump-project.html