North American Water-Side Economizer Map (2009)

Overview

This source is a Green Grid map dated 23 July 2009 that evaluates water-side free-cooling potential in North America. In the TGG library the item type is listed as 'Video & Image', and the author is The Green Grid Association. It is a companion to the air-side free-cooling maps.

The key feature of the source is that only the map is published: the data behind it are not separately accessible. The results therefore cannot be recomputed, assumptions such as wet-bulb temperature thresholds or chiller approach temperatures cannot be learned from the record, and the map offers only a visual overview.

Because the document dates from 2009, its climate data and facility temperature design practices reflect that period. Its scope is limited to North America, so it cannot be used directly for other regions. ASHRAE 90.4 is named as a related standard. The source should therefore be treated as a visual cross-check, not as a substitute for design calculation.

Key points

1. Dated 23 July 2009; item type 'Video & Image'.
2. Evaluates water-side free-cooling potential in North America.
3. Underlying data are not available separately (map only).
4. Author listed as The Green Grid Association.
5. Companion to the air-side free-cooling maps.
6. Related standard: ASHRAE 90.4.

Using it in design

• Use the map only as a visual cross-check.
• The tool should compute water-side economiser hours from wet-bulb weather data and chiller approach temperatures.
• For locations outside North America, run a separate calculation with local climate data.

Who should read it

Designers selecting cooling systems who want an early estimate of free-cooling potential.

Related standards

• ASHRAE 90.4

Publication details

Authors

The Green Grid Association

Publisher

The Green Grid

Year

2009

Document language

English

Source type

Industry body

Access

Citation only

Licence

Copyright retained; citation only — the publisher’s terms apply to the original document

Citation