A standalone dehumidifier will heat the air more than sweating can cool it. You can see that from conservation of energy and thermodynamics: evaporating water (eg. when you sweat) absorbs heat , and condensing water (eg. in a dehumidifier) releases an equal amount. You also need to pay a bit of extra energy to run the machine and to overcome entropy.
Using an air conditioner to dehumidify doesn’t have that same problem, as it vents the heat outside.
There are some circumstances where a freestanding dehumidifier would help. Suppose you live in an airtight corrugated iron hut. In shade. With 100% humidity. Your air inside is at ambient temperature. You run the dehumidifier, and the air gets hotter and dryer. The heat can easily conduct out through the walls, but the dryness stays. So soon your room is full of near ambient temperature dry air. So sweating can cool you.
Re: dehumidifiers
A standalone dehumidifier will heat the air more than sweating can cool it. You can see that from conservation of energy and thermodynamics: evaporating water (eg. when you sweat) absorbs heat , and condensing water (eg. in a dehumidifier) releases an equal amount. You also need to pay a bit of extra energy to run the machine and to overcome entropy.
Using an air conditioner to dehumidify doesn’t have that same problem, as it vents the heat outside.
There are some circumstances where a freestanding dehumidifier would help. Suppose you live in an airtight corrugated iron hut. In shade. With 100% humidity. Your air inside is at ambient temperature. You run the dehumidifier, and the air gets hotter and dryer. The heat can easily conduct out through the walls, but the dryness stays. So soon your room is full of near ambient temperature dry air. So sweating can cool you.