A47 -- Design and Application of Controls (SI)

Automatic control of HVAC systems and equipment usually includes control of temperature, humidity, pressure, and flow rates of air and water. Automatic controls can sequence equipment operation to meet load requirements and to provide safe equipment operation using pneumatic, mechanical, electrical, electronic, and/or direct digital control (DDC) devices. Automatic controls are only fully effective when applied to well-designed mechanical systems; they cannot compensate for misapplied systems, excessive under- or oversizing, or highly nonlinear processes. This chapter addresses control of typical HVAC systems, design of controls for system coordination and for energy conservation, and control system commissioning. Chapter 7 of the 2009 ASHRAE Handbook--Fundamentals covers details of component hardware and the basics of control.

Chapter Table of Contents

System Types

Heating Systems

Cooling Systems

Air Systems

Special Applications

Design Considerations and Principles

Control Principles for Energy Conservation

Citation: 2011 ASHRAE Handbook -- HVAC Applications: Chapter 47, Design and Applications of Controls



Product Code(s): D-A472011SI