Performance comparison of air conditioners and various dehumidifiers

Performance comparison of air conditioners and various dehumidifiers
Until now, we have focused on the efficiency of various heating and cooling appliances, mainly air conditioners.
I have written about ideal usage, comparisons, recommendations, etc.
However, looking back, there were many lectures and talks about dehumidifiers.
"Air conditioners are the most efficient"
No concrete reasons for this have been given.
So, I'd like to try that this time.
First of all, the dedicated dehumidifiers available at home appliance stores are large.
Divide
"Compressor type" (almost like a heat pump)
"Zeolite type" (in other words, desiccant type)
"Hybrid type" (a hybrid of the above two types)
They can be classified into three types:
If you look at the number of products on Kakaku.com,
From top to bottom, they are 52 types, 25 types, and 5 types.
We can see that the compressor type is the most common type.
Compressors are also built into air conditioners, and this system is closest to that used in air conditioners.
We randomly selected popular products from each of these three methods and compared their power consumption and
We compared the amount of dehumidification (g) per hour and the ratio of the amount of dehumidification to the amount of power consumed.
Compressor type 416g 290W 1.43 times
Zeolite type 145g 285W 0.51 times
Hybrid type 383g 535W 0.71 times
The result was:
It may seem obvious, but the compressor type, similar to that of an air conditioner, is the most efficient.
It turns out that the zeolite method, which uses heat to dry the zeolite, is the least efficient.
So, the hybrid system, which is a compromise between the two, has an intermediate level of efficiency.
If we were to invent a new term to describe this ratio, it would be something like "Dehumidification COP."
If we look at efficiency alone, only the compressor type remains, but
There's a reason there are other varieties.
Compressor type air conditioners tend to have weaker dehumidifying capabilities during cold seasons other than summer.
The zeolite method absorbs moisture into a desiccant, and when it becomes saturated, it dries it with heat.
This method also makes it resistant to low temperatures.
The hybrid type is a product that falls somewhere between the advantages and disadvantages of both.
Now, as for the all-important thing, the air conditioner, I did a rough calculation on a high-performance model for a 6-tatami room at rated operation.
As mentioned the other day, this calculation is based on the assumption that the latent heat ratio is 40%.
Then the result is
707g 450W 1.57 times
The result was:
It is still the best, but its performance is a little better than that of the compressor type.
If you set the temperature lower, you will get an even better rate.
On the other hand, it is also true that lower performance models do not achieve this level of performance.
As for further background information, I received a message from a construction company that was enthusiastic about Daikin.
I was asked about "household desiccant."
You can think of this as a highly advanced version of the zeolite type home appliance.
In the general zeolite type, the desiccant is simply dried using an electric heating wire.
In domestic dehumidifiers, this heat is generated by a heat pump.
I think this is the most ideal way to do it, except for the price.
That being said, I am somewhat regretful that I did not write this article a few months earlier.