Engineering Manual of Automatic Control (for Commercial by Honeywell

By Honeywell

Engineering handbook for HVAC

Show description

Read Online or Download Engineering Manual of Automatic Control (for Commercial Buildings, Heating, Ventilation, Air Conditioning) PDF

Best technique books

A detailed approach to model transport, heterogeneous chemistry, and electrochemistry in solid-oxide fuel cells

This e-book lays out a numerical framework for the distinct description of heterogeneous chemistry, electrochemistry and porous media delivery in solid-oxide gasoline cells (SOFC). Assuming hydrogen because the in basic terms electrochemically energetic species, a converted Butler-Volmer equation is used to version the electrochemical cost move.

Advanced Information Systems Engineering: 8th International Conference, CAiSE'96 Heraklion, Crete, Greece, May 20–24, 1996 Proceedings

This ebook offers the refereed complaints of the eighth overseas convention on complex details structures Engineering, CAiSE '96, held in Herakleion, Crete, Greece, in might 1996. The 30 revised complete papers incorporated within the booklet have been chosen from a complete of a few a hundred submissions. The ebook is organised in sections on CASE environments, temporal and lively database applied sciences, event studies, interoperability in details structures, formal equipment in method improvement, novel architectures, workflow administration and dispensed info platforms, info modelling, object-oriented database layout, and semantic hyperlinks and abstraction.

Engineering Turbulence Modelling and Experiments 5

Turbulence is likely one of the key concerns in tackling engineering movement difficulties. As strong pcs and actual numerical equipment at the moment are to be had for fixing the circulate equations, and because engineering purposes almost always contain turbulence results, the reliability of CFD research relies more and more at the functionality of the turbulence types.

Extra resources for Engineering Manual of Automatic Control (for Commercial Buildings, Heating, Ventilation, Air Conditioning)

Sample text

Change in setpoint x 100 Change in compensation input For proportional controllers, the throttling range (TR) is included in the equation. Two equations are required when the throttling range is included. For direct-acting or positive reset, in which the setpoint increases as the compensation input increases, the equation is: Authority = PROPORTIONAL-INTEGRAL (PI) CONTROL In the proportional-integral (PI) control mode, reset of the control point is automatic. PI control, also called “proportionalplus-reset” control, virtually eliminates offset and makes the proportional band nearly invisible.

The error ramp time determines the time duration during which the PID error (setpoint minus input) is slowly ramped, linear to the ramp time, into the PID controller. The controller thus arrives at setpoint in a tangential manner without overshoot, undershoot, or cycling. See Figure 41. ACTUATOR POSITION PERCENT OPEN 100 PROCESS CHARACTERISTICS As pumps and fans distribute the control agent throughout the building, an HVAC system exhibits several characteristics that must be understood in order to apply the proper control mode to a particular building system.

In practice, however, one or more auxiliary devices are often necessary. , from pneumatic to electric), relays and switches to manipulate signals, electric power and compressed air supplies to power the control system, and indicating devices to facilitate monitoring of control system activity. C2087 Fig. 55. Typical Pneumatic Damper Actuator. 34 ENGINEERING MANUAL OF AUTOMATIC CONTROL CONTROL FUNDAMENTALS CHARACTERISTICS AND ATTRIBUTES OF CONTROL METHODS Review the columns of Table 4 to determine the characteristics and attributes of pneumatic, electric, electronic, and microprocessor control methods.

Download PDF sample

Rated 4.50 of 5 – based on 28 votes