Hijend Hotel Chilled Water System Model and Video
The videos and SketchUp models below can be use for various self study and class room exercises that revolve around the Hijend Hotel central chilled water plant.
SKETCHUP MODELS
Note the following with regard to the SketchUp models.
With version 2021, SketchUp has done some work that makes file sizes much smaller. So I have started posting the models in both version 2021 format and version 8 format (the latter have the letters SUv8 appended to the file name). If at all possible, I suggest that you use the SketchUp 2021 viewer so you can work with the smaller file size models as I believe they will be faster and easier to navigate in.
If you happen to have the professional version of SketchUp 2021, that will work also. But the free version, that will not work with some of the models because it runs as a web application and some of the models are too large to upload.
The only limitation I know of with regard to using the SketchUp 2021 viewer is that you need a 64 bit machine for it to run on. If you don't have a 64 bit machine, you will find information about how to get a legacy version of SketchUp that will run on a desktop on the SketchUp Resources page of the website.
I have also been able to open most of the models in the relatively new SketchUp mobile applications for iPad and Android, but have also found it to be "buggy" with some of the larger ones, at least on my iPad Pro. So, while it is very smooth when it works, I suggest that you not use it - or at least not count on it (i.e. have the viewer or some version of SketchUp on a laptop that you can use) until some of the buts are resolved.
SKETCHUP MODELS
Note the following with regard to the SketchUp models.
With version 2021, SketchUp has done some work that makes file sizes much smaller. So I have started posting the models in both version 2021 format and version 8 format (the latter have the letters SUv8 appended to the file name). If at all possible, I suggest that you use the SketchUp 2021 viewer so you can work with the smaller file size models as I believe they will be faster and easier to navigate in.
If you happen to have the professional version of SketchUp 2021, that will work also. But the free version, that will not work with some of the models because it runs as a web application and some of the models are too large to upload.
The only limitation I know of with regard to using the SketchUp 2021 viewer is that you need a 64 bit machine for it to run on. If you don't have a 64 bit machine, you will find information about how to get a legacy version of SketchUp that will run on a desktop on the SketchUp Resources page of the website.
I have also been able to open most of the models in the relatively new SketchUp mobile applications for iPad and Android, but have also found it to be "buggy" with some of the larger ones, at least on my iPad Pro. So, while it is very smooth when it works, I suggest that you not use it - or at least not count on it (i.e. have the viewer or some version of SketchUp on a laptop that you can use) until some of the buts are resolved.
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Hijend Hotel Documents
Some of the Hijend Hotel SketchUp Model exercises include images of different documents associated with the facility. You may not be able to read them in the models or videos due to resolution settings in your machine. Or, you may just want to be able to study them more closely. The files below are copies of the various documents. The names are (hopefully) self explanatory.
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Variable Flow Plant Information
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This zip file contains general information about variable flow primary secondary chilled water plants including:
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Build Your Own Psych Chart Spreadsheet
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This is the spreadsheet behind the images on the string of blog posts I have about how to draw your own psych chart using basic physical principles.
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Bureaucratic Affairs Building Heating Hot Water System Logic Modification Exercise Answer
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The file hhw_logic_diagram_vweb_-_answer.xlsm is a copy of the Logic Diagram Tool with the "Answer" to the logic diagram exercise in it on the "HW Hx Cntrl Enhanced" tab.
The file Heat Exchanger Narrative Sequence - Answer v2.pdf is pretty much what the name indicates; the original narrative sequence modified to add the enhancements. The Point List - Answer vweb.zip file contains a .pdf of the revised point list in addition to the Excel spreadsheet tool version. | ||||||
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If you are curious about what some of the other logic associated with the hot water system in the Bureaucratic Affairs Building might look like, the spreadsheet to the left is a copy of the logic diagram tool with tabs depicting:
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Duct Fitting Pressure Drop Calculation Examples
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This file contains calculations similar to the ones behind the table in the blog post.
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This file illustrates how you would string calculations similar to the elbow calculation together to project the pressure drop for a fairly large system. This is a calculation I did for a real system in a high-rise so I could compare the pressure drop you would anticipate based on the design documents with what we were measuring in the field.
Locations with differences were places we investigated to understand why there was more pressure drop than the design anticipated. Usually, it was because the details of the fitting fabrication in the field were different from the design documents. However on at least one project, the reason was a welding jacket that had been left in the duct during fabrication which subsequently was blown down the duct and became lodged on some turning vanes. | ||
You will find additional details on this topic as well as examples of how to go about doing the calculations in the materials from the Fans, Ducts, and AHUs; Design, Performance, and Commissioning Issues Class that I help with at the Pacific Energy Center.
