Search Results for: chillers

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.

Optimizing Chillers & Towers

Journal Article

Optimizing Chillers & Towers

Chillers + Lighting + TES

Journal Article

Chillers + Lighting + TES

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

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

Installing Absorption Chillers

Journal Article

Installing Absorption Chillers

Optimizing Chillers & Towers

Journal

How a system operates at design conditions is not always a good indicator of its overall annual performance. This article emphasizes controls logic and design conditions and how they can be used to optimize chiller, cooling tower and condenser pump system performance throughout the year. A software model of hour-by-hour energy use for a typical office building in three cities demonstrates the effect of different cooling seasons and wet-bulb profiles. (Results are presented in energy use [kWh]. Actual dollar savings can be estimated by assuming a blended energy rate.)

Johnson Controls Officially Opens "the World’s Biggest Makerspace for Chillers”

Learn more about Johnson Controls Officially Opens "the World’s Biggest Makerspace for Chillers” at ashrae.org

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.