Mroy's profile - activity

EP-Launch-Lite Error Hi All Does anybody know the reason why E+ generates a launch-lite error on Mac laptops? (image att

I have been trying to find the link to online E+ directory explaining E+ calculations on structural mass energy interchange with the space, could anybody please point me to it? Trying to find the E+ algorithms/calculations on how on hot summer days higher internal air temperature is soaked up by cooler exposed concrete structure.

Thanks a lot Eric. E+ can actually use the full spectral properties (outlined in Glazing System Properties - Window calculation model). M

Does anybody know if EnergyPlus uses full (or partial) spectral properties of translucent materials and glass to calculate solar transmission (and associated gains)? Attached C:\fakepath\Spectral properties of polycarbonate.png for instance is the transmission of a poly-carbonate surface that I am modelling as a function of varying wavelength. I noticed that DesignBuilder (that I use as graphical interface) allows me to edit a fairly detailed spectral data library for fabric opening materials, and I am wondering if this gets used in E+ for simulations, as opposed to only static figures that asign a single value to infra-red, solar and visible properties of glass, films and polymers? Thanks a lot Roy

Thanks a lot Aaron for your comprehensive reply.

Hi Archmage I hope I’m not losing your good will. I think I have done what you advised me to do (path was H:\Work\ICTA energyplus input files\Thermostatschedule.csv.) I however get a fatal error saying the file was not found. If you might be inclined to have a look at it I would be more than happy to send the idf through, my e-mail is ‘royapoor.m@gmail.com’. Happy New Year…

I’m modelling a greenhouse where an aluminised insulation screen covers the entire roof (internally) whenever internal temperature falls below 16℃ to protect the crops. Does anybody know if it is possible to model this in EP?

Hello Archmage I spend a couple of days trying to do this. You answered what I need to do beautifully (if only I can do it!!). Forgive my ignorance but: If I create a text file of 8760 entries corresponding to every hour of the year, how do I tell EP that this is my space target temperature? Is it just a simple matter of placing the text files in the space where all existing schedules exist? in my text editor this section that starts with: !---------------- control type schedules (for heating and cooling) ---------------------- Or do you reference it separately? I appreciate your thoughts + Merry Christmas!

p.s I would be happy to share the EP file and temperature setpoints :o)

That is exactly what i want to do. could you please send a link to where Schedule:File documents are? I couldn't find it ...

Hi David A more complex schedule. So instead of warming the space to a fixed 18℃ in winter, I want to create an hourly schedule where the target temperature is a bit like this: until 07:00, 13.5℃ until 08:00, 16℃ until 09:00, 20℃ until 10:00, 20.5℃ …. Until 24:00, 25℃ I don’t know how to create a schedule, and assign it to the simulation! Could you point me in the right direction? Many thanks...

Hi all Most of the time we use single static setpoint and setback values to control space temperatures, but I want a more dynamic and time-variant profile to define zone target temperatures to emulate real world conditions and calculate corresponding loads. Does anybody know the best way to set up a temperature schedule for this purpose? I have looked at EnergyPlus documentation but couldn't find any info. Thanks