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TitleDehumidification in HVAC System p1
File Size4.5 MB
Total Pages80
Table of Contents
                            SYS-APM004-EN: Dehumidification in HVAC Systems
	Title page, author
	Preface
	Contents
	Introduction
	Chapter 1: Sources and effects of indoor moisture
		Why be concerned about indoor humidity?
			Indoor air quality
			Occupant comfort and productivity
			Building maintenance
		Climate considerations
		Energy use
	Chapter 2: Dehumidification primer
		Types of dehumidification
			Local dehumidification
			Remote dehumidification
		Processes for dehumidification
			Condensation on a cold coil
			Adsorption using a desiccant
		Implications for HVAC control
			Humidity control during unoccupied periods
			Building pressurization
			Airside economizing
	Chapter 3: Dehumidifying with constant-volume mixed air
		Analysis of dehumidification performance
		Application considerations
			Ventilation
			Climate
			Packaged DX equipment
			Total-energy recovery
			Cold supply air
			Humidity control during unoccupied periods
			Building pressurization
			Airside economizing
		Improving coincidental dehumidification
			Adjustable fan speed
			Mixed-air bypass
			Return-air bypass
			DX coil circuiting
		"Direct" control of humidity
			Separate air paths
			Supply-air tempering
	Chapter 4: Dehumidifying with variable-volume mixed air
		Analysis of dehumidification performance
		Application considerations
			Minimum airflow settings
			Supply-air-temperature reset
			Supply-air tempering at VAV terminals
			Humidity control during unoccupied periods
			Building pressurization
			Airside economizing
		Improving dehumidification performance
			Condition outdoor air separately
			Deliver colder supply air
                        

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