What a motor need to be able to get connected to VSD?

[mehdikardehi]

I am not an electrician....I want to purchase an evaporative air conditioner which the air flow can be adjusted by a VSD. Could that be done to any evaporative coolers out there?

 

[Blutooth]

I am no expert in this field, but I think you need to make sure that the chiller is able to modulate. The VSD will change the air flow of the ventilator fitted on to your evaporator. This means the cooling drawn from your evaporator will fluctuate along with the VSD, thus your chiller will have to modulate along with the VSD.

 

[mehdikardehi]

By evaporative cooler I mean swamp cooler

 

[willard3]

You can vary the airflow with a VSD, but it will have unpredictable results.
Motors used with VSD should be designed for use with VSD.

 

[EnergyProfessional]

check with motor manufacturer

 

[cry22]

Evaporative coolers are typically Constant Volume type air systems (used in wide open spaces), Not Variable Air Volume type, VSD's are for VAV only, not CV.

 

[mehdikardehi]

there are many variable speed evaporative coolers out there

 

[cry22]

in what kind of application Mehdi?

 

[mehdikardehi]

commercial.... The one that I am about to use it is a commercial kitchen

 

[cry22]

You really need Variable volume for a commercial kitchen using evaporative cooler?
Can you really have a descent pay-back on the VAV system and controls compared to the energy saved? you're talking what? 3 Hp? 5 HP motor?

 

[mehdikardehi]

5500 l/s

 

[cry22]

Just what I thought, anywhere between 3 and 5 HP between 1" and 1.5" SP for such systems.
Nowhere in hell can you have a payback for such a low BHP, not even talking about the additional maintenance and trouble of controls.
You should keep it cheap and simple and go CV pal.

 

[mehdikardehi]

thanks mate...will investigate the $ figures ...electricity in Australia is the most expensive in the world

 

[SAK9]

Not so much an issue of $ here.It is about comfort and noise level.I do not know what is the kitchen size here.Assuming it is 6mx6m,that is 153 litres of air per sq.meter with its resultant drafts and noise.When you are cooking,you need it.When you are done with cooking,spare the guys from the turbulent blast of air!