Everyone, please tell me the algorithm to set the air conditioner to achieve a DI level of about 23. I am doing a project to automatically control the air conditioner to achieve a comfort index based on the temperature and humidity of the environment. The humidity and temperature sensor I use is sht30, the air conditioner uses a toshiba brand, irremote esp8266 library. The humidity cannot be changed, so I will set the air conditioner temperature so that it changes the ambient temperature according to the humidity to achieve the desired DI.
Really, have you never seen the water (humidity) extracted by an A/C running out the back of an A/C?
A dehumidifier is a common appliance in humid countries.
The most basic A/C controller uses the classic bi-metal strip, but I assume you want to use a more modern sensor like the SHT30.
Because your topic does not indicate a problem with IDE 2.x it has been moved to a more suitable location on the forum.
T = (DI - (0.55 * (1 − 0. 01𝑅𝐻) x 14.5)) / (1 − 0.01𝑅𝐻)
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That might not be possible in many cases. You don't have any control of your heat exchanger temperature, so if is for example 8'C (in cooling mode), it will remove (condense) humidity from air in most real life situations.
I mean we can only actively change the temperature in the room with the air conditioner but the humidity cannot be controlled, and I know when the air conditioner is on it will reduce the humidity.
So with this formula, how would you set up the algorithm to set the air conditioner so that the room temperature will change correspondingly to the humidity in the room and achieve a DI of about 23. I live in a tropical monsoon climate, the room temperature is about 33°C and the humidity is 75%. Because I can't actively change the humidity, I think I will have to change the room temperature based on the current humidity. Can you help me?
The formula is the algorithim. Just replace DI with 23 and RH with whatever you measure.
Temperature is givenin degrees Celsius..
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I would have a seperate de-humidifier in that environment. In the last few years the quality and utility of household dehumidifiers has improved dramatically. I was living in a temperate rain forest a couple years ago and my Costco dehumidifier was able to bring the humidity down to comfortable levels with no problem unlike the old units.
Untrue, I have had both de-humidifiers when I lived in a temperate rain forest, and now I have humidifiers in order to prevent damaging static around all my electronics parts.
Still need help?
Electric de-humidifier is technically air conditioner with both indoor and outdoor units put inside. So while removing moisture it's cooling and heating at the same power. That is likely not preferred in hot climate and economically no-sense. Instead it's practical in climate where you don't want to cool the ambient.
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Just to clarify, the correct equation should be:
based on the original equation
And assuming that:
Then:
If we use the equation inside the red box to find the temperature assuming DI = 35.1565 and RH = 78% then:
On the other hand, based on your equation the temperature is:
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Modern dehumidifiers work much better. Not theory, I have had two. One was in an area where we would get mould growing on the walls if we didn't have a dehumidifier.
You of course conveniently made a multiplication mistake when you used my formula.
No doubts, but with air conditioner same kWh used you remove same quantity of moisture plus you cool the ambient. Only difference is where the heat is discarded, in or out.
ps. I have one as well, super practical on our autumn weather when humidity is high and temperature low.
What room temperature and relative humidity level do you want to achieve? If the dew point to achieve 40% RH was, say, 5° C, the A/C condenser would have to run at a lower temperature which could require reheating the discharge air to maintain desired room temperature.
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The whole topic is no-sense if there are not any parameters to work with. What's the temperature and humidity range we are playing with? Which one is the more problematic element, humidity or temperature? What kind of AC you have? Mini split?