preparing the next generation of building technicians · cooling tower a/c condensers north. ect...
TRANSCRIPT
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Preparing the Next Generation of
Building Technicians
Laney's Model for Advanced Curriculum and
Laboratory Requirements
ECT Laboratory
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ECT Laboratory
Environmental
Control Technology
Program (HVAC/R)
Green Collar Job Training at Laney College
In some cases “defining” the new technician
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Topics
� The HVAC Laboratory
� The Controls Initiative
� New Courses
ECT Laboratory
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ECT HVAC Laboratory
� Laney has had a strong refrigeration/hvac program forover 20 years
� The Refrigeration Laboratory is evolving to supportexpansion and updating of the curriculum
� A local engineering firm, Taylor Associates, prepared adesign for a commercial HVAC lab addition
� The additional equipment is about 80% installed
� New/altered coursework uses the commercial gradeair handling and hydronic components
� State of the art DDC controls are being added
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
OFFICE
STORAGE
CLASSROOM
ENTRY
COMPUTER
TRAINING
ADVANCED REFRIGERATION TRAINERS
BASIC TRAINERS BASIC TRAINERS
WORK BENCHES
RESIDENTIAL HEATERS
NEW COMMERCIAL
HVAC LAB
COOLING TOWERA/C Condensers
North
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ECT HVAC Laboratory
� The Laboratory size is approximately 5500 s.f. (ofabout 7800 s.f. department space)
� The additional commercial equipment includes:
� 30 ton scroll type water chiller, primary andsecondary pumping systems and cooling tower
� 300,000 btuh hot water boiler with variable volumedistribution
� 4 air handlers
� VAV and dual duct terminals
� DDC controls
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
•Computer Simulations:
• TRACE 700
• ePrimer
•Simutech
• Internet Searches
• Problem Based Learning
presentations
• Controls Training
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ECT HVAC Laboratory
ECT Laboratory
pink – heating hot water
blue – chilled water
green – condenser distribution
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
Size Matters!
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ECT HVAC Laboratory
ECT Laboratory
Variable Speed Hydronics
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
VAV and Dual Duct Terminalshot water and electric reheat
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ECT HVAC Laboratory
ECT Laboratory
Belimo Control ValvesPICCV
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
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ECT HVAC Laboratory
ECT Laboratory
• Laney’s cirriculum is very much “hands on”
• HVAC installation classes are performing some of the
work
• TAB classes performed some of the startup
• The HVAC Laboratory is evolving:
• Coursework experience dictates adjustments
• Grants have their own requirements
• Commercial partner donations affect installation
• The Lab will be functional for Fall classes
• Some of the commissioning will be via classroom
exercises
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DDC Controls Initiative
ECT Laboratory
• Funded from a State grant
• An addition of “major significance” to the HVAC Lab
• Install functioning DDC controls for the HVAC Lab and
cirriculum
• Test concepts of systems integration, particularly the
integration of BACNET devices from a number of
manufacturers
• Provide a platform for commercial partners to confirm
integration of specific components
• Includes the design and installation of a “convertible”
control panel
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DDC Controls Initiative
ECT Laboratory
“The basis of the HVAC Lab BAS Controls systems design is to
provide a multi-vendor BAS(Building Automation System) for the
HVAC lab’s mechanical equipment, designated for instructional
purposes only. The BAS shall be “real world” technology, meaning
the systems shall be installed and operated as it would in an actual
commercial building environment. The unique aspect of this
training aide will be the interoperability of the different control
vendor products, and the requirement to share information and
functionality to the extent that these control systems shall be
interchangeable at the primary controller level, without limiting the
HVAC equipment capabilities.”
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DDC Controls Initiative
ECT Laboratory
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New Courses
ECT Laboratory
•Technical Mathematics
•Testing Adjusting and Balancing
•DDC Controls (2)
•Commissioning
•Psychrometrics and Load Calculations
•Commercial Air Conditioning
•Motors and Drives
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Technical Mathematics
ECT Laboratory
•Demonstrate the ability to add, subtract,
multiply and divide whole numbers, fractions
and decimals, and interpret and solve HVAC
word problems.
•Calculate areas and volumes, and to
convert measurements between the SI and
IP systems.
•Apply math principles to the solving of
typical HVAC problems involving,
temperature, pressure, velocity, flow in ducts
and pipes and air conditioning loads.
•Draw, read and interpret graphs, and have
experience reading fan curves and pump
curves
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Technical Mathematics
• Number System/Decimal Arithmetic
• Decimal Arithmetic
• Decimal Arithmetic problems
• Addition of Common FractionsSubtraction of Common Fractions
• Multiplication of Common Fractions
• Division of Common Fractions
• Practice with Fractions
• Ratio and Proportion
• Percent, Percentage and Discounts
• Equivalent Units of Temperature Measure
• Linear Measurement
• Area Measure
• Volumetric Measure
• Ohms Law and Electrical Relationships
ECT Laboratory
•Gas Laws
•Rates and Fluid Measurements
•Flow in Ducts and Pipes
•Heat Load Calculations
•Angular Measurement/Trigonometry
•Trigonometric Functions
•Graphs and Graphing
•Estimates and Bills
•Spreadsheets/Data logging
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Testing Adjusting and Balancing
ECT Laboratory
•Demonstrate the ability to measure and adjust
airflow in common air handling systems,
including duct traverse, flowhoods and fan
characteristics
•Demonstrate the ability to measure and adjust
water flow in common hydronic systems
•Complete an air and water balance on a simple
all air heating system and complete sample
TAB forms
•Apply TAB principles and techniques to
measuring and the system parameters of
typical residential and light commercial unitary
HVAC systems
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Testing Adjusting and Balancing
• Review of HVAC System Types
• Airflow in Ducted Systems
• Characteristics of Fans and Diffusers
• Fan Flow Characteristics and Fan Curves
• Air Dampers
• The Testing, Adjusting and Balancing report - 1
• Hydronic Systems
• Measurement of Flow in Pipes
• Centrifugal Pump Basics
• Hydronic Balancing
• The Testing, Adjusting and Balancing report - 2
• Review of Controls and Control Systems
• VAV Box Fundamentals
• Balancing of Light Commercial Systems
• Testing Residential Heating Systems
ECT Laboratory
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DDC Controls
ECT Laboratory
•Demonstrate the proper and safe installation,
wiring, and programming of a building control
system.
•Generate proper documentation for DDC
systems.
•Demonstrate necessary skills for
troubleshooting both hardware and software
problems.
•Demonstrate necessary calibration
procedures for input and output devices.
•Read and write sequence of operations for
HVAC systems.
•Create comprehensive commissioning test
procedures for testing control systems.
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Commissioning
ECT Laboratory
Cx
• Coursework is under development
• Generic not HVAC specific, but with HVAC emphasis
• Will pull together skills learned in other classes, TAB,
Commercial Air Conditioning Systems, Math, DDC etc.
•Will emphasize basic commissioning principles:
• Determining ”Owner’s Requirements”
• Organizing the Effort
• Exploring the resources (PECI, BCxA, PIER, etc.
• Practice...Practice…role playing…report writing and
presentation
“Building commissioning is a systematic process of ensuring that a building’s
complex array of systems is designed, installed and tested to perform
according to the design intent and the building owner’s operational needs.”
www.energydesignresources.com
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Psychrometrics (load calculations)
ECT Laboratory© American Standard Inc. 1999
Relative Humidity, Dew Point,
Humidity ratio, Enthalpy, R-Value,
U-FACTOR
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Psychrometrics (load calculations)
ECT Laboratory© American Standard Inc. 1999
• History of the Psychrometrics (Dr. Carrier)
• Human Comfort
• Characteristics of moist air and definition of terms
• Heat transfer , conduction convection and radiation
• The Psychrometric Chart
• Heat Loss and Heat Gain in structures
• Calculations of loads for small, simple structures
• Use of computerized load simulation tools
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Commercial Air Conditioning
ECT Laboratory
Introduction to commercial HVAC
Systems, with emphasis on how building
components such as chillers, boilers, fans,
pumps, variable frequency drives, and
associated ventilation and zone
equipment work together to form complex
systems. .. This course will also cover
proper maintenance procedures for
energy conservation.
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Motors and Drives
ECT Laboratory
This course will introduce the students to
motors and drives used in commercial and
industrial Refrigeration, Air Conditioning,
Heating and Ventilation applications. It will
introduce students to the different types of
motors, drives and control applications,
including electric and magnetic variable-
frequency drive for improved control and
energy savings… Students will have the
ability to build motor controls, to program
drives, and to troubleshoot circuits through
out the course.
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Challenges and Opportunities
� Finishing the Lab (5 years from design)
� Meeting grant objectives
� Finding ways to increase enrollment,
especially from the commercial sector
� Continuously improving educational
delivery methods
ECT Laboratory