Search Results for: chillers

Optimizing Chillers & Towers

Journal Article

Optimizing Chillers & Towers

Chillers + Lighting + TES

Journal Article

Chillers + Lighting + TES

Installing Absorption Chillers

Journal

Discusses the differences between an absorption chiller design and an electric chiller, and their implications for the architect's role, the structural engineer's role, power loss concerns, the mechanical designer's role and commissioning. Notes additional considerations and provides advice aimed at ensuring that absorption chiller projects run as smoothly as electric chiller projects.

Chillers + Lighting + TES

Journal

As we approach the ten-year anniversary of the chlorofl uorocarbon (CFC) ban that took effect in 1996, only 57% of the estimated 85,486 large tonnage CFC chillers in the U.S. and Canada have been replaced or converted. According to the estimates from the Air-Conditioning and Refrigeration Institute (ARI)1 and the Heating, Refrigeration and Air-Conditioning Institute of Canada (HRAI),2 by the end of 2004, approximately 37,000 CFC chillers still operated in North America.

Engineers’ Dialogue: Higher Efficiency Chilled Water Systems Without VFDs

Learn more about Engineers’ Dialogue: Higher Efficiency Chilled Water Systems Without VFDs at ashrae.org

How Chillers React to Building Loads

Journal Article

How Chillers React to Building Loads

Addressing Noise Problems in Screw Chillers

Journal Article

Addressing Noise Problems in Screw Chillers

AT-15-C053 -- Analysis of Airflow Patterns and Air Temperature Distribution Surrounding Air-Cooled Chillers

Conference Proceeding

AT-15-C053 -- Analysis of Airflow Patterns and Air Temperature Distribution Surrounding Air-Cooled Chillers

Addressing noise problems in screw chillers

Journal

Reports that two 300 ton (1055 kW), water-cooled rotary screw chillers and a 125 ton (440 kW) air-cooled rotary screw chillers caused noise problems at two different hospitals. Presents case histories of these two chillers, which demonstrate a noise problem known as 'pure tone' noise, which is often overlooked in the design process by the practising HVAC engineer. Discusses pure tones and describes how to identify pure tone noise sources. Concludes with recommendations on how to deal with noise-critical installations.

All-Variable Speed Centrifugal Chiller Plants

Journal

Very often selection programs find variable speed centrifugal chillers to be less cost effective than constant speed chillers. This has made uncertain the future of variable speed in centrifugal chiller plants. However, plants with variable speed chillers can operate much more efficiently than constant speed plants, but only if operating strategies are incorporated that are tailored specifically to these chillers' unique performance characteristics.