Dear All, I have some question about my project, Our project is a cosmetic factory. Can I assume this project to Light Manufacturing type? And If this project haven't select any machine to put in the factory, How can I select process load for energy simulation? I'm not sure that have a default process load for Manufacturing or not but I have read an ASHRAE 90.1 User Manual in table G-B the receptacle power density is 0.2 W/ft2 so can I use this value to be default for our project? In other way, We use eQUEST for simulation and If I assign that zone to Comm/Industrial Work, eQUEST have default Equipment value 1.0 W/ft2, Can I use this value to assume process load in this zone?

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 11/24/2014 - 14:34

Sounds like light manufacturing. Using 0.2 W/sf as your entire process load would not be acceptable. See the note under Table G-B. I am not aware of any acceptable default value to use for light manufacturing since the specific product being made will have a huge variability regarding energy use. At some point you will be required to model the process loads as designed, even if you make some initial assumptions. If it were my project I would make some broad assumptions about the process equipment and estimate energy use. If you are doing your final model I would defer it to the construction review and you should have the specific process equipment designed by then.

Panupant Phapant

SCG Cement - Building Materials

LEEDuser Basic Member

13 thumbs up

Tue, 11/25/2014 - 04:51

Hi Marcus, Thanks for the reply. We'll make some broad assumptions for process equipment and tentative energy use. Here I have a bit question about note under G-B, 3.These values are minimum acceptable. If other process load are not input, it's recommended that receptacle power densities be increased until the total process energy consumption is equivalent to 25% of total load. From this note, If we put 0.2 W/ft2 and process load become 25% of total. Can we use this value? or this 25% portion is for office building only and process load for manufacturing should be refer to actual process energy consumption?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 11/25/2014 - 14:23

In general the process load for light manufacturing should be greater than 25%. The 25% they refer to is for an office. The process load should reflect the actual process load.

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