Spray rain water or collected condensate water on compressor to raise efficiency?

My system already does that with the condensate. It needs to be kept clean to avoid legionella, and will improve efficiency slightly in a dry atmosphere where it will give a cooling effect. How much improvement it would give I can only guess.

I've worked in more than one data centre where on the hottest day of the year, a few people have had to stand outside spraying the condensor units with hoses, and it makes an enormous difference.

I'm less certain in your case though. You will eventually warm up the 55 gallons of water which will significantly impair its cooling ability. Also you will be spraying this heated water into the air. You could end up infecting someone in the neighbourhood with legionares disease. This is one of the most common ways it breeds and is spread.

Andrew,

Thanks.

My 2 condensers produce about 2 gallons an hour of condensate.

My idea is to collect 10 gallons or so, activate a pump, and expel 10 gallons from the 55 gallon barrel, and replace with fresh condensate.

An algaecide/bacteriacide in the condenser pan would prevent bacteria and algae formation.

AAMOF Algae slime is a MAJOR concern here in FL.

What do you use in the U.K. to prevent algae (and not damage the coils etc.)?

Coincidentally, I stayed at the same Philadelphia hotel where Legionnaire's disease was unfortunately discovered.

FWIW see me and my latest invention on YouTube:

OOPS! I meant evaporators.

Just trickle that down the the condensors as it's produced (or find some way to atomize it and blow it in -- some condensing boilers in the UK do that to get rid of the condensate with the flue gases, but I've not seen how they do it). Don't store the water at all. There are a number of portable air conditioners which do that in the UK, and although it helps with the efficiency, reducing or eliminating emptying of the condensate tank is the main motivation.

I don't think it's necessary in an air conditioner which isn't storing or recyling warm water.

I had a friend (now retired) who looked after the local parks and fountains. It was an ongoing problem finding something they could use in the fountains which prevented bacteria and algae, was non-toxic when someone decided to drink the water from the fountain, and didn't produce large amounts of foam.

Hi,

Would be safer and need less pressure/power to just trickle it over the condenser.

You won't get much evaporative cooling if the ambient humidity is very high though.

Worth keeping a close eye on the ali fins for any galvanic corrosion reaction with the copper pipes.

If the compressor gets really hot it might help to have a fan blowing on it.

cheers, Pete.

The compressor (when integral with the motor) is cooled by the refrigerent going through it, and therefore expects to be hot. A fan blowing at the compressor won't do anything significant (maybe a few tens of watts at best, when the thing is generating several kW anyway). The heat from the compressor is carried away by the refrigerent and dumped in the condensor, together with the heat extracted from the evaporator.

I half expected someone to say something like that...

I *used* to think along similar lines but there's more to it than you think.

I've tried it and it worked for me, I'd suggest the OP does the same.

If it makes a worthwhile improvement, the fans can be wired so they're switched on with the compressor.

(Best try a fan on the suction side initially, an extra fan on the discharge side might not improve things much further)

I can almost guess what you might say next =)

cheers, Pete.

If the radiator is hot it will be cooled by a spray whatever the humidity.

It's going to be a drain on the natural water cycle though, except that in Florida the natural water cycle on humid days supplies large volumes of slightly nitrogenous preciptation.