This study investigates task -blind and task -specific training methods to determine appropriate radial basis function based neural network architectures. These neural nets identify system behavior of air-cooled chiller condensers by grouping dominant features (clustering) of measured chiller performance data. Task specific clustering proved superior but more computationally demanding than task...

Component and subsystem models used to evaluate the performance of a low-lift cooling system are described. An air-cooled chiller, a hydronic radiant distribution system, variable-speed control, and peak-shifting controls are modeled. A variable-speed compressor that operates over 20:1 speed range and pressure ratios ranging from one to six is at the heart of the chiller. Condenser fan and chil...

Aiming at the issues of unreasonable cooperation schemes and inappropriate setting parameters refrigeration system with multi-chiller plants, this paper presents a cooperative optimization method to improve energy performance composed water-cooled chillers air-cooled heat pumps. The process includes scheme parameter optimization. To content dynamic cooling load, working sequence pumps variable ...

Using a computer simulation this paper presents a few selection implications when the condensing unit of an existing R22 water-cooled chiller is to be replaced by a new unit that is originally sized for a different refrigerant. The selection of a new unit is assumed to be based purely on the information available in typical product catalogues. The performance of the upgraded (or retrofitted) sy...

This work applies the second-law analysis of thermodynamics to quantify the exergy destruction of the components of screw liquid chiller, and to identify the potential for each component to contribute to improve the overall energy efficiency of the system. Three screw liquid chiller units were built to demonstrate the feasibility of the model presented herein. Unit A was a 100 RT water-cooled s...

A study was conducted to determine the effects of treating and reusing poultry chiller water in a commercial poultry processing facility. Broiler carcasses and chiller water were obtained from a commercial processing facility which had recently installed a TOMCO Pathogen Management System to recycle water in sections 2 and 3 of two 3-compartment chillers. In this system, reused water is blended...

In this study, a frequency converter was used to carry out variable frequency control to the compressor with constant frequency of a small 3RT central air-conditioning air-cooled chiller, but the indoor blower and cooled water pump were still kept by constant frequency operation. It is to explore the energy-saving effect of chiller compressor and the cooling fan after being carried out the vari...

Energy consumption in the buildings is responsible for 26% of Australia’s greenhouse gas emissions where cooling typically accounts for over 50% of the total building energy use. The aim of this study was to investigate the potential for reducing the cooling systems’ environmental footprint with applications of alternative renewable energy source. Three types of cooling systems, water cooled, a...