period one
Types of Water Chillers
notes
ASHRAE/IESNA Standard 90.1–1999
▲Energy Standard
◆Building design and materials
◆Minimum equipment efficiencies
◆HVAC system design
Figure 26
ASHRAE/IESNA Standard 90.1–1999,Energy Standard for Buildings, Except Low-Rise Residential Buildings, went into effect in October 1999. ASHRAE is the American Society of Heating, Refrigerating and Air-Conditioning Engineers and IESNA is the Illuminating Engineering Society of North America. This standard addresses all aspects of buildings except low-rise residential buildings. It contains specific requirements for both water chillers and chilled-water systems.
standard 90.1-1999 efficiency requirements
Electric Vapor-Compression Chillers
chiller type | capacity | minimum efficiency* |
air cooled | all capacities | 2.8 | COP | 3.05 | IPLV |
| | | | | | | |
water-cooled | | | | | | | |
reciprocating | all capacities | 4.2 | COP | 5.05 | IPLV |
| | | | | |
helical-rotary, scroll | < 150 tons [528 kW] | 4.45 COP | 5.2 | IPLV |
| 150 to 300 tons [528 to 1,056 kW] | 4.9 | COP | 5.6 | IPLV |
| > 300 tons [1,056 kW] | 5.5 | COP | 6.15 | IPLV |
| | | | | | |
centrifugal | < 150 tons [528 kW] | 5.0 | COP | 5.25 | IPLV |
| 150 to 300 tons [528 to 1,056 kW] | 5.55 COP | 5.9 | IPLV |
| > 300 tons [1,056 kW] | 6.1 | COP | 6.4 | IPLV |
* as of October 29, 2001 | | | | | | | Figure 27 |
| | | | | | |
Standard 90.1 contains minimum full- and part-load efficiency requirements for packaged water chillers. The table in Figure 27 is an excerpt from Table 6.2.1C of Addendum J to the standard. It includes the minimum efficiency requirements for electric vapor-compression chillers operating at standard ARI conditions. The standard also contains tables of minimum efficiency requirements for these chillers operating at nonstandard conditions. The test procedure for these chillers is ARI Standard 550/590–1999. Notice that these requirements go into effect on October 29, 2001.
