DIY Geothermal Heat Pump. Season 3. Ep5. Fixing heat pump design mistakes.

Howdy! It’s time to fix mistakes that were made in my initial geothermal heat pump design. I was wrong an now it’s apparent that the evaporator should be bigger than the condenser.

I switched them up and the picture has become noticeably better. The output now is 2.81℃. In the next season I plan to increase heat exchangers size even more to utilize the full potential of the compressor.

Stay safe and enjoy the video!

Read the Transcript

• So, the son-student comes to the home village on vacation.
• Previously, coming by train was a rare thing.
• They didn’t run often, once in a half of a year.
• Or even less.
• Parents were really happy to see their son.
• Father went and slaughtered two ducks for dinner.
• Mother plucked them up.
• They cooked these ducks real good.
• Prepared a nice dinner table with mashed potatoes, canned cucumbers, etc…
• Father served a drink for them.
• They drank it, obviously.
• A soulful conversation between the father and son happened.
• So dad asks his son.
• Well, my dear son, please tell me.
• You’re studying now, right? What did they teach you at the university?
• The son thought for a moment about how to tell his dad what the hell does he study there.
• He says: “Well, father, look.”
• Took a piece of paper and a pen.
• “I can prove to you right now that there are not two ducks on this table, but three.”
• Well, said father, go on.
• The son started writing…
• Wrote a huge cheat sheet …
• And finally says: “Look father, I proved that there are three ducks here”.
• Dad scratched his head in confusion.
• Well, son…
• Then we’ll do it this way.
• One duck is for your mother, the second one - for me, and you can enjoy the third! 😀
• So be it!
• That’s the story.
• Greetings, gentlemen.
• What’s the moral of this story you’ll find out at the end of the video.
• At a moment of demagoguery.
• Today I want to return to the earlier announced error that I found in my heat pump.
• I don’t know how much it made sense to shoot a separate video for that, but having a description of this error, plus a minute of demagoguery, I hope you’ll enjoy it.
• Let’s watch!
• So, I was wrong.
• This is my evaporator.
• This is a condenser.
• I calculated that if 3 kW comes to the evaporator, plus 1 kW of heat from the compressor, the output should be 4 kW.
• The evaporator must be smaller than the condenser.
• So I welded it accordingly.
• And, as it turns out, I was wrong.
• In fact, the condenser should be smaller and the evaporator should be larger.
• It works a little differently.
• The fact is that here the liquid fills the evaporator, and boiling occurs.
• Firstly, the liquid column itself prevents the bubbles from breaking off and boiling…
• The boiling of a freon.
• Secondly, we have a temperature difference that needs to be taken …
• We need to take the heat with minimal losses.
• The boiling temperature should be as close as possible to the temperature of the heat transfer agent from which we remove the heat.
• For the highest COP.
• Therefore, the evaporator should be as large as possible.
• For a condenser, this is not so critical, there is still a high temperature.
• In any case, there is some overheating.
• Here it can be around 2-3 ℃.
• And here it can be much bigger, 15 - 20 ℃.
• Therefore, as a rule, the condenser is made smaller than the evaporator.
• Now I will switch them up.
• Here is how everything works after switching heat exchangers.
• Or rather, after I swapped the condenser and evaporator heat exchangers.
• The picture has become noticeably better.
• The output is 2.81℃.
• and freon goes 5.89℃.
• The difference is only 3℃.
• This is overheating, not overcooling.
• But noticeably better.
• The plans for the next season are to increase heat exchangers size at least twice.
• The first one and the second.
• To be able to use the full potential of the compressor.
• It can be tweaked somewhere up to 90 Hz.
• 90 Hz is still + 25%.
• Therefore, I would like to make heat exchangers bigger.
• I think this is the next step.
• Or rather, not the next step, but the plan for the next season.
• Now we will need to deal with the geothermal loop.
• This is a separate issue.
• The topic of a separate video.
• To be continued…
• There are at least two subtexts in the story I told at the beginning of the video.
• The first subtext is that most things that are too abstruse are wrong.
• The second subtext says that you need to be simpler.
• And if you come to the village, then you need to speak the language that is spoken in the village.
• And to use the knowledge, the concepts that circulate in this village.
• Those professionals who randomly came to my channel,
• they are most likely only interested in the results that I received as a result of the operation of this heat pump.
• And they know how it all works.
• I don’t see the point in explaining it in complicated terms.
• Complex explanations are already written in books, and there are training videos in which all this is told correctly.
• With clever scientific words.
• Isothermal moveme…😀
• Isothermal…process.
• I almost said “Isothermal moving stock”😀.
• Carnot cycle.
• Adiobat, isochore, isobar.
• There are many such words.
• Taking this opportunity, I want to draw attention to the situation that happened with the price of gas at the end of 2021.
• It is clear that there is a speculative component.
• But even if this component did not exist, gas prices should have risen.
• Because, on the one hand, there is a mass refusal of such large players as Europe, China, America from fossil coal.
• And of course, what to replace it with now? Gas.
• This is on the one hand.
• On the other hand, there is some economic recovery after Covid-gate.
• Therefore, the price of gas is now rising and will continue to rise.
• Because, in any case, there is some kind of production and it is quite difficult to raise it in the short term.
• Even if you use shale gas.
• Especially since it will be needed more and more.
• Because the economy tends to consume more gas over time.
• Or rather, not gas, but energy carriers.
• Therefore, gas will rise in price.
• I don’t know where it will stop.
• But sooner or later, even if we consider the calorific value of gas and electricity in kW / h, then they will equalize.
• And even gas will be more expensive.
• Because there is a need for it.
• Not so much for generating electricity, but for the chemical industry, for other industries.
• You just can’t do without it.
• And electricity will not be able to step over some bar in terms of price.
• Because as soon as electricity becomes more expensive, it becomes possible to buy green energy at its cost, or even more.
• It is clear that the cost of storing this electrical energy in some storage devices is also added there.
• In tanks, in the form of gas, there are a lot of options.
• And these options do not work now, for example, because gas is cheap, or coal is cheap.
• So, anyone who is now using gas, get ready, the price will rise soon.
• Therefore, if you have money, invest it in a heat pump. 😉👍
• Sooner or later it will become profitable.
• It is clear that you can wait until it becomes cheaper, but at that moment it may turn out that you do not have money.
• So, if you have extra money now - invest in a heat pump. 💪
• In the next video, you will see my conclusions on a geothermal heat pump.
• And also I will make outlines of the plan of what I will do next.
• Subscribe, like, comment.
• But remember, be nice!☝️