[TRNSYS-users] Different schedule for summer and winter

[Alastair McDowell via TRNSYS-users]

Hi Ahmed,

I would program this inside the TRNSYS Studio rather than in TRNBuild as its slightly more complicated.

Create three new Type 14 Forcing Functions in Studio, and program the occupancy lightly hourly schedule for each one, for summer/winter/spring. Use Type 14d specifically for lighting. The instantaneous output for each of these could be called LIGHTING_SUMMER, etc.

Then create three more general Type 14h Forcing Functions, each one being equal to 1 during the required period, whether that is summer/winter/spring. The time values should go from 0 to 8760. The instantaneous output for each of these could be called SUMMER_TIME, etc.

Then combine these together in one equation such as: LIGHTING_SCHEDULE = LIGHTING_SUMMER*SUMMER_TIME + LIGHTING_SPRING*WINTER_TIME + LIGHTING_SPRING*SPRING_TIME.

Then feed this into your Type56 building by creating a new input in TRNBuild, update building variable list, and connect the LIGHTING_SCHEDULE into the building.

A simple way to do this is with just two forcing functions – one for the lighting schedule, and one for the seasonal profile, which multiplies the lighting schedule up or down by a factor, depending on the annual season. But you would need to use the first method using 6 forcing functions if you required unique schedules for each season.

Kind regards,
Alastair McDowell
Engineering Consultant
Energy Analysis & Engineering – Enabling innovation for a sustainable future
T: +61 450 600 842
E: alastair.mcdowell at energyae.com<mailto:alastair.mcdowell at energyae.com>
608 Harris St Sydney NSW 2007 Australia | http://www.energyae.com<http://www.energyae.com/>

From: TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] On Behalf Of ahmed serageldin via TRNSYS-users
Sent: Monday, September 5, 2016 11:48 AM
To: TRNSYS-users-subscribe at onebuilding.org; trnsys-users at lists.onebuilding.org
Subject: [TRNSYS-users] Different schedule for summer and winter

Dear all

How to apply different occupancy lighting hourly schedule for summer and winter and spring
Yours sincerely;

Eng: Ahmed Mohamed Awad
Ph.D student
Energy Resources Engineering Department(ERE)
Egypt-Japan University of Science and Technology(EJUST)
Mob:+2010-65078029
Email: ahmedawadserageldin at gmail.com<mailto:heba_abadi at hotmail.com> - ahmed.serageldin at ejust.edu.eg<mailto:heba.abbadi at ejust.edu.eg>
Website: www.ejust.edu.eg<mailto:heba.abbadi at ejust.edu.eg>
P.O. Box 179, New Borg El-Arab City, Postal Code 21934, Alexandria, Egypt

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