This message has been cross posted to the following eGroups: Building Information Modeling and Green AV .
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I had a discussion with Richard Blackwell about how to incorporate electrical and sustainability classifications into the VidCAD data structure. He recommended that I post these questions on the Green AV, Software for Sustainability and BIM InfoCOMM SIGs.
For years, VidCAD has been used to create drawings and reports on the power consumption and air conditioning loads of racks and rooms. An example of this is in our sample drawing RedBook p31: http://vidcad.com/index.php?option=com_content&view=article&id=66&Itemid=57
We are looking to improve our data structures-adding additional fields and reporting capability for our customers to manage their Sustainability targets. This poses careful examination of current and potential future standards and measurements.
The goals are to create meaningful sustainability reports and to provide critical information which can flow in and out of a designer's engineering, whether that is in AutoCAD, REVIT or IFC's.
I would appreciate some feedback on the following items:
Current VidCAD power fields:
1. Amps
2. Watts
3. Volts
Considering clarifying these with the following fields:
4. AC/DC--Boolean
5. Change Amps to CalculatedAmps. Thus, by linking amps, watts and volts, the user can enter any 2 and find the third by applying Ohm's Law.
6. Add FuseAmps. I have found that the amps or calculated amps from spec sheets are difficult to assess in power consumption. Is the power specified at startup (max), normal or average? I would rather trust the amps listed on the fuse for real max power consumption. Too often when a breaker is turned on in a rack or room, all the equipment goes on and then browns out because startup power was not considered. Unfortunately, this is not normally on spec sheets.
7. Change Volts to a drop-down which would include these common specs, plus a "fill-in-the-blank" option:
a. 1
b. 3
c. 6
d. 9
e. 12
f. 24
g. 70
h. 110
i. 220
j. 110/220
k. 440
l. Other (type entry)
Are there any other standard voltages that we should include?
8. Add StandbyWatts. This appears to be the trend for specifying standby power consumption.
Should we continue to just look at wattage for AC Load? I often use Watts x Pi, which comes very close to the AC engineer's calculation if you assume all power is converted into heat.
The next issue is Sustainability Standards. How can we effectively categorize these standards in a meaningful way?
| Category | Boolean | Typical response (if not Boolean) |
| 1. ASHRE? | | |
| 2. Energy Star? | | |
| 3. LEED? | | |
| 4. RoHS? | | |
| 5. GreenSpec | | |
| Other Recommendations |
| 6. | | |
| 7. | | |
| 8. | | |
Any suggestions on how these can be categorized in a database for easy use? What can be derived from these standards for preparing sustainability reports? Can they be used by an engineer, owner or facility manager to prepare an estimate of savings? Compliance?
Another area I would appreciate assistance is in control and temperature. With temperature, we currently have fields for temp_high and temp_low. Richard Blackwell suggested we include at least these fields:
| 1. TempSensor | Boolean |
| 2. TempTrigger | |
| 3. ControlSystem | Boolean |
| 4. ControlSystemType | |
| Other items? | |
| 5. | |
| 6. | |
He also suggested I post this on the Green AV, Software for Sustainability and Building Information Modeling SIGs.
Of course, getting this data consistently is difficult, and leaves a lot to the end-user. I would note that manufacturers are not supporting the InfoCOMM EZip standard-any more than they supported the earlier specs recommendations, like SMPTE's Engineer-Friendly Documentation. When will manufacturers understand they should not subject their resellers, consultants and end-users to be clerk-typists and spec archivists! If they could be persuaded to support this standard, we have already prepared our data structures to allow for direct input. But…
Thank you for taking the time to read this e-mail. I look forward to your responses.
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Dr. Walter Black
VidCAD Documentation Programs
CTO and Senior Consultant
Las Cruces NM
United States
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