Head Loss ft/100 ft Volumetric Flow Rate, gpm Figure 7: Proposed Standard 90.1 flow limits for 2,000 hr/year constant flow CHW systems. on a single row. However, for clarity it is Operating >2,000 and >4,400 and often convenient to enter data on multiple 2 in. overall energy consumption of the system. This is why the proposed [51 mm]); pipe sizing limitations in Standards 90.1 and 189.1P only apply to • One wye strainer; chilled and condenser water systems. • One silent check valve; • Average water temperature of 50°F (10°C); Example 2: Standard 90.1 Addendum • No limits for noise or erosion; and Addendum af to 90.1-2007 limits the maximum design flow • First costs are based on national average from 2008 RS rates through chilled and condenser water piping systems. The Means Mechanical Cost Data. 30 ASHRAE Journal ashrae.org October 2008
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