SAMA Symbols Introduction
Scientific Apparatus Makers Association, (SAMA) is the organization
that came up with the symbolic language to represent advanced control schemes.
Green Energy Engineering, Inc., has used SAMA symbols for over 30 years
to describe boiler controls and has introduced many young engineers to this powerful
new (old) process control language.
Industries and utilities alike are renewing their emphasis on boiler efficiency,
energy savings and lower emissions levels, as reducing their “carbon footprint”
takes on greater importance. Engineers are analyzing the control systems and instrumentation
for boilers, putting on paper the complex processes and interactions that make boilers
function. Some may be doing it to add a renewable energy to the mix to increase
overall output, to meet regulatory requirements or to receive tax rebates from government.
This focus on a “green” energy-producing environment has lead to a revival of interest
among process engineers and others in the old and esoteric notations called SAMA
symbols.
SAMA symbols are used to develop and convey the complex functional interworking
of boiler control loops. Most control loops in industry are simple temperature,
pressure, level, or flow loops made up of just three devices including: a transmitter,
controller, and control valve. However, boiler controls involve feed back, feed
forward, cascade, and parallel functions.
The white papers listed below are offered to the engineering community
as a service by Green Energy Engineering, Inc. Those of us with gray
hair need to pass our tools along to those new college graduates who can still do
calculus but have not yet tuned a boiler.
White Paper Title:
- SAMA Symbols – Why
use them?
- SAMA
Symbols – The Process Control Language
- SAMA Symbols – Drum
Level
- SAMA Symbols
– Firing Rate
- SAMA Symbols – Multi
Fuel
- SAMA Symbols – O2 Trim