ASHRAE.HandBook_49-2007 SERVICE WATER HEATING

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1、RelatedCommercialResourcesCHAPTER49SERVICEWATERHEATINGSystemElements.......................................................................49.1Hot-WaterRequirementsandStorageEquipmentSizing.......49.11Water-HeatingTerminology............................................

2、.........49.1LoadDiversity........................................................................49.11SystemPlanning.......................................................................49.2Residential..................................................................

3、............49.11Water-HeatingEquipment........................................................49.2CommercialandInstitutional................................................49.12DesignConsiderations.............................................................49.4Sizing

4、Examples.....................................................................49.15Distribution..............................................................................49.4SizingInstantaneousandSemi-InstantaneousTerminalHot-WaterUsageDevices........................

5、.................49.8WaterHeaters.....................................................................49.24WaterQuality,Scale,andCorrosion.......................................49.8SizingRefrigerant-BasedWaterHeaters...............................49.25SafetyDevicesforH

6、ot-WaterSupplies....................................49.9BoilersforIndirectWaterHeating.........................................49.25SpecialConcerns.....................................................................49.9Water-HeatingEnergyUse...........................

7、.........................49.26ATERHEATINGenergyuseissecondonlytospacecondi-Inthischapter,itisassumedthatanadequatesupplyofbuildingWtioninginmostresidentialbuildings,andisalsosignificantservicewaterisavailable.Ifthisisnotthecase,alternativestrategiesinmanycommercialandi

8、ndustrialsettings.Insomeclimatesandsuchaswateraccumulation,pressurecontrol,andflowrestorationapplications,waterheatin