A water-cooled condenser is a heat exchanger that removes heat from refrigerant vapor and transfers it to the water running through it. Having the refrigerant vapor condensed on the outside of a tube does this. In doing so, the vapor condenses and gives up heat to the water running inside the tube
To size a water-cooled condenser, we must first find the total heat of rejection for the system. For an air-conditioning or high backpressure system, it is safe to size the condenser by nominal horsepower, or tons of refrigeration load. 12,000 BTU/hr is the normal figure for one ton or horsepower. To this, add 3,000 BTU/hr heat of compression for a total of 15,000 BTU/hr per ton.
For medium and low temperature systems, take the actual load and add 3,000 BTU/hr per horsepower.
For instance, a low temperature three-ton load with a 10 horsepower compressor would be calculated:
- 3 tons = 36,000 BTU
- 3,000 x 10 = 30,000 BTU
Water Cooled Condensor
- They operate at better efficiencies. Overall a water-cooled condenser unit will typically consume far less overall energy, which can lead to savings on energy costs and consumption.
- Extended lifespan. Because of the efficiency of the medium, and the lack of weather-exposed parts, a water-cooled system will typically last years longer, assuming maintenance is not neglected.
- Can operate better at higher temperatures. Industries such as manufacture may find that water-chilled systems operate more effectively in high-temp areas.