> It's the SI unit, what else do you want to use lol?
HVAC companies in the US exclusively use ‘tons’ to describe the amount of heat a chiller or heat pump can move. Trane, Daikin, and more all use ‘tons’ on both their marketing and engineering material.
1 ton ~= 3.56kW, but a 1-ton chiller will use ~= 1kW of electricity to remove 3.56kW of heat due to the COP of 3-4 for an air cooled chiller.
Since every cooler review took payola to pump bogus performance charts so they never settled on scientific measurements.
For those wondering, the standard measure is thermal resistance in degrees per watt, for linear systems - doubling the heat that needs to be transferred doubles the temperature difference between the sides. Adding in heat pipes, liquid convection, etc is going to make the system non-linear, so then it makes sense to talk in terms of the delta-T at given wattages. And then since there are phase-change materials, the working temperature should be specified as well. Yes, there are three scalars before you even get to things like scaling fan speed.
(I'm not a mechE so I'm sure there's something I'm missing still)
lm28469|26 days ago
Americans measure it in bald eagle wing flaps per football fields but that's just an American thing
quickthrowman|26 days ago
HVAC companies in the US exclusively use ‘tons’ to describe the amount of heat a chiller or heat pump can move. Trane, Daikin, and more all use ‘tons’ on both their marketing and engineering material.
1 ton ~= 3.56kW, but a 1-ton chiller will use ~= 1kW of electricity to remove 3.56kW of heat due to the COP of 3-4 for an air cooled chiller.
Daikin Chillers: https://www.daikinapplied.com/products/chiller-products
Trane Chillers: https://www.trane.com/commercial/north-america/us/en/product...
mindslight|26 days ago
For those wondering, the standard measure is thermal resistance in degrees per watt, for linear systems - doubling the heat that needs to be transferred doubles the temperature difference between the sides. Adding in heat pipes, liquid convection, etc is going to make the system non-linear, so then it makes sense to talk in terms of the delta-T at given wattages. And then since there are phase-change materials, the working temperature should be specified as well. Yes, there are three scalars before you even get to things like scaling fan speed.
(I'm not a mechE so I'm sure there's something I'm missing still)
polishdude20|26 days ago