Take It to the Limit ...or Just Halfway? PDF

Presents a simple evaluation method for comparing chiller/tower energy consumption which support the claim that an 'extreme' strategy (providing the coldest leaving water temperature possible) is not optimal under all conditions. States this method helps the designer to quickly examine the effect of leaving-tower water temperature on a particular chiller/tower pair. Presents worked examples. Notes that, depending on design parameters, significant savings may be obtained at part load, especially at operating points below 50% of full load.