Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

Green roof Irrigation schedule

asked 2018-04-18 01:49:16 -0500

Milad gravatar image

updated 2018-04-18 07:10:17 -0500

Hello

I am modeling green roof for my building and I want to have irrigation schedule for my green roof. However, I cannot find appropriate schedule type based on mm per day. If you can help how to adjust this type of schedule I appreciate.

Thanks

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
2

answered 2018-04-24 13:34:17 -0500

Avi gravatar image

updated 2018-04-25 00:15:00 -0500

I assume you are using E+ I did something like that for calculating the amount water my future garden will consume : I started by calculating the dripperline flow per minute. image description

Then I estimated the amount of water the garden will consume each month. (I used government calculator which take rainfall into account).

image description

You should use the cubic meter per hour number and divide it by your roof irrigation surface area to get the irrigation rate [meter per hour]

Now for the question you asked - you can look in the YourDriveLeter:\EnergyPlusV8-8-0\ExampleFiles\EcoroofOrlando.idf example of E+

! Schedule for irrigation (1"/irrday summer 0.5"/irrday winter: Mon and Fri at ~10am)
! Note: UCF documentation inconsistent 1 vs 2 " in summer per week??
! To avoid stability issues with 1hour timesteps we simply add 1/7th of weekly
! precipitation evenly divided into 2 hours each of ALLDAYS each season
! Note: 0.00181 in*2hrs*7days = 1 inch per week
! m/hour

  Schedule:Compact,
    IRRIGATIONSCHD,          !- Name
    Any Number,              !- Schedule Type Limits Name
    Through: 3/31,           !- Field 1
    For: Alldays,            !- Field 2
    Until: 07:00,0.0,        !- Field 3
    Until: 09:00,0.00181,    !- Field 5
    Until: 24:00,0.0,        !- Field 7
    Through: 12/31,          !- Field 9
    For: Alldays,            !- Field 10
    Until: 07:00,0.0,        !- Field 11
    Until: 09:00,0.00242,    !- Field 13
    Until: 24:00,0.0;        !- Field 15
edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

 



Question Tools

1 follower

Stats

Asked: 2018-04-18 01:49:16 -0500

Seen: 46 times

Last updated: Apr 25 '18