Chiller packages which use refrigerant compressors are the main part of a cooling system. The chiller being the single most costly piece of equipment of the air-conditioning system that influences the life cycle economics. Professionals focus on various issues related to chiller selection . This program is simply an aid in developing considerations and assessment and is intended for use by students, chiller operators, consultants, construction designers, contractors and HVAC personnel.
The chiller is a refrigeration device producing cooling and the most common types seen today are vapor compression chillers. The chillers are usually referred to by the type of compressor used whether they be scroll, screw, reciprocating and centrifugal compressors.
Many installations in the world are based on vapor compression chillers and others using the absorption chiller
The refrigeration equipment used for air-conditioning is normally sold as a packaged unit.
Reciprocating chillers are often used for small systems that require cooling loads less than 150 TR. Above 150 TR either the multiple reciprocating or the screw and centrifugal compressors may be evaluated subject to the wider framework of life cycle analysis, energy performance, health and safety.
Centrifugal chillers are best suited for the larger installations typically above 750 TR. The centrifugal machines offer high peak load efficiency and operate reliably for applications demanding a steady state operation. On acute load variations, the centrifugal machines are susceptible to surge conditions. The machines are only recommended with water-cooled condenser option.
The screw chillers are well suited for applications demanding up to 750 TR. Above these capacities, centrifugal chillers may be more cost effective.
Operational costs and not just initial costs must be considered and it is important to know that the air-conditioning system normally does not run on peak load. Part load efficiency needs to be considered
It is therefore common for an installation to have several chiller packages, both to provide standby and to enable cooling load to be matched with the minimum consumption of power. Designing systems around the economy of operation is the art in successful economic and practical advantages to all.
Here is an interesting calculator that might help someone to understand how
Engineers might be calculating chiller Efficiency
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Calculate Heat energy and power for heating or cooling or calculate flow rate of fluid that is heated or cooled. This program applies to all types of heat exchangers, hot water boilers, industrial chillers, air heaters, radiators and other thermal energy appliances in industrial space heating or HVAC.
http://www.flowmeterdirectory.com/energy_consumption_calculator.html |
| Pump Manufacturer : |
Hybrid water and air cooled (4 pipe) chillers. |
| Products : |
Hybrid water and air cooled (4 pipe) chillers.
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| Description : |
Hydronika manufactures a line of 4 pipe chillers ranging in size from 6 tons to 25 tons.
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| Contact Info : |
Tel: 502 647 8998 |
http://www.hydronika.com |
USA |
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