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  • Home
    • What's New
  • Blog
    • Blog Support
  • SketchUp Models
    • SketchUp Resources
    • Bureaucratic Affairs Building HHW System Logic Exercise
    • Bureaucratic Affairs Building Scavenger Hunt
    • Chilled Water Plant System Diagram Exercise
    • The HIjend Hotel >
      • Chilled Water Plant Scoping Exercise
      • Ballroom AHU Scoping Exercise
      • Cooling Tower Scoping Exercise
  • Tools
    • Altitude Correction Factor
    • Economizer Evaluation Checklist
    • Eikon for Educators and WindLGC
    • Effective Duct Length Tool
    • Excel Third Axis Tool
    • Excel Time Value Conversion
    • Insulation Savings Tools
    • Logic Diagram Tool >
      • Logic Diagram Example - Discharge Air
      • Logic Diagram Example - CHW Plant 01
      • Logic Diagram Example - VAV AHU
    • Mixed Air Calculations
    • Monitoring Plan Spreadsheet
    • Pipe Friction Chart
    • Plot Digitizer >
      • Plot Digitizer Pump Curve Example
    • Square Law Spreadsheet
    • System Diagram Symbols
    • Thermodynamic Diagrams Spreadsheet
    • Universal Translator Data Analysis Tool
    • y = (m * x) + b Spreadsheet
  • Useful Formulas
    • Affinity Laws
    • Circular Equivalent Duct
    • Effective Duct Length
    • FT Guide Appendix C
    • HVAC Equations and Concepts
    • Hydraulic Diameter
    • Pump Power and Energy
    • "Square Law"
  • What's That Thing?
    • Cooling Towers
    • Pumps
    • Valves
  • Resources
    • Bill Coad's Writings
    • Data Logging Resources
    • EBCx Skills Guidebook
    • Energy Design Resources
    • Fisher Controls Valve Cavitation Bulletin
    • Functional Testing Guide
    • Honeywell Gray Manual
    • MCC Powers Bulletins
    • NBCIP Reports
    • PEC Tool Lending Library
    • PID Resources
    • Pneumatic Control Resources
    • Resource List
    • Scoping Resources
    • TAB Resources
    • Vintage Carrier Design Manual
    • VRF Systems
    • Williams' Wisdom
  • Videos
    • Bureaucratic Affairs HHW Logic Answers
    • Cooling Tower Flow Variation
    • Economizer Stratification
    • Functional Testing
    • Induction Principles
    • Monitoring Plans
    • CW Pump Deadheaded by Tower Lift
    • Ripple Effects
    • Testing a Pump
    • The Garden of Low Entropy
    • Variable Flow Systems
  • Training
    • Materials from Classes and Presentations >
      • ACEEE
      • ASHRAE
      • ASHRAE - Engineers Notebook
      • BCxA and NCBC
      • BEST Institute
      • Case Studies
      • ERDC 2020 RCx Academy
      • ELPNW
      • ICEBO
      • Marriott AEP
      • Magazine Articles
      • NAVFAC
      • Pacific Energy Center Design, Performance and Commissioning Issues Classes
      • Pacific Energy Center EBCx Project Review
      • Pacific Energy Center EBCx Workshop Series >
        • EBCx Workshop Series 12
        • EBCx Workshop Series 13
        • EBCx Workshop Series 14
        • EBCx Workshop Series 15 >
          • Student One On One Discussions
        • EBCx Workshop Series 16
        • EBCx Workshop Series 17
        • EBCx Workshop Series 18
      • Portland General Electric
      • U of W >
        • U of W Archive
    • On Demand Training >
      • Benchmarking UCA and Scoping
      • Loads and Psychrometrics
      • Induction Motor Principles
      • Introduction to Functional Testing
      • Scope of Work Documents
      • System Diagraming
    • Training Opportunities
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Eikon for Educators and WindLGC

Eikon for Educators is a free copy of the Automated Logic programming software that you can use to learn about logic diagrams.
eikon_logicbuilder_for_educators.zip
File Size: 202787 kb
File Type: zip
Download File

Better yet, once you have built your logic, you can run it in simulation mode.  While this will not tell you anything about the interaction between building and system dynamics and your logic, it will help you see how the "domino's will fall".  (Incidentally, if you follow the link, don't get bored and stop watching before the end;  it's worth it.)

The image below is the logic for a flywheel cycle that solved a number of problems on a project I was involved with.   Having the ability to simulate the logic (basically, forced response testing) allowed me to tweak the logic until I was pretty sure the only things left to adjust would be related to how the logic interacted with the building, its systems, its occupants, and the climate.  If you want to know more about the flywheel cycle and how it evolved, I did a presentation about it at the 2013 National Conference on Building Commissioning.
Picture
Wind LGC (available in both 32 bit and 64 bit versions) is a free copy of IDEC's programming software for their Smart Relay, which is basically a little tiny Programmable Logic Controller (PLC).  This is another tool you can use to learn about logic, but in the form of a ladder diagram, which at its heart, is just a different type of logic diagram.  In the olden days, we did a lot of logic with relays;  the Jeopardy Game I discuss in my blog post about relay logic is an example of applying the concept for a little family fun.

The image below is part of a WindLGC program that I wrote to understand what the logic would need to look like to control a multi-speed kitchen exhaust hood that needed to be controlled by a five position rotary switch.  It became surprisingly complicated to some constraints imposed by the way we wanted the occupants to interface with the system and the available hardware.
Picture
The links below will take you to the Eikon and WindLGC files associated with these two examples if you want to play with them.  I have also included links to some of the supporting information for the Kitchen Exhaust Fan so you can understand what it all looked like on the contract documents.
Le Conte Hall Flywheel Cycle Eikon Program (flywheelv11.logicsymbol)
File Size: 56 kb
File Type: logicsymbol
Download File

Kitchen Exhaust Fan WindLGC Logic File (fs-22_kitchen_exhaust_v4.lld)
File Size: 211 kb
File Type: lld
Download File

Construction Documents Associated with Implementing the Kitchen Exhaust Fan Logic (asi_049_range_hood_controls.pdf)
File Size: 10747 kb
File Type: pdf
Download File

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