How do you size an absorption chiller?
It is calculated by dividing the cooling output by the 299 Page 2 required heat input. For example, a 500-ton absorption chiller operating at a COP of 0.70 would require: (500 x 12,000 Btu/h) divided by 0.70 = 8,571,429 Btu/h heat input.
How is COP of absorption chiller calculated?
The efficiency of an absorption chiller is measured by the coef- ficient of performance (COP), which is defined as useful thermal energy output (i.e., chiller load) divided by heat input. Where high temperature heat sources are available, either design can be used.
What does an absorption chiller do?
An absorption chiller can reduce the cost of electricity, hot water, heating and cooling for the facility. Due to lack of compressors in the machine, the noise and vibration are significantly reduced in the building, providing a quiet environment with high reliability.
How big of an absorption chiller do I Need?
A new scientific paper published in July gives readers an overview of state-of-the-art absorption chillers below 50 kW of cooling capacity.
How does a vapor compression and absorption water chiller work?
Both the vapor-compression and absorption refrigeration cycles accomplish cooling by absorbing heat from one fluid (chilled water) and transferring it to another fluid (cooling water or ambient air). Both cycles circulate refrigerant inside the chiller to transfer this heat from one fluid to the other.
Why do we need capacity control of HVAC chillers?
Capacity control of HVAC chillers is very logical and required to save the input energy at low or part-load on chillers. Chillers providing absorption cooling use different types of input energy.
Where does the energy for a sorption chiller come from?
Sorption chillers, which are avail- able as either absorption or adsorption designs 1 , are driven with thermal energy produced from a direct fired burner integrated with the chiller, or with thermal energy supplied indirectly to the chiller. Indirect thermal sources include hot water, steam, or combustion exhaust.