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Hotel rooms with occupancy sensors

asked 2019-01-28 11:27:01 -0500

Jim Dirkes's avatar

updated 2019-02-10 11:39:33 -0500

Dear UMH people,

Occupancy sensors add an interesting wrinkle to modeling a hotel's energy consumption when the hotel uses PTAC or PTHP guest room HVAC. I've created / cobbled a method which adapts ASHRAE "typical" occupancy patterns so that cccupancy is binary and parallels the (EnergyPlus) fan availability schedule so that the room temperature can be setup or setback multiple times each day.

Are you aware of any research on this topic? Do any of you have an alternative method that you are willing to share? Thanks in advance for your help!

p.s., ASHRAE 90.1-2013 and beyond require guest room occupancy sensors and my state (Michigan) has adopted that version of 90.1, so it's a topic that will be of increasing interest, I think.

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answered 2019-01-29 05:54:31 -0500

ngkhanh's avatar

updated 2019-01-29 05:56:12 -0500

Manually, I create schedules for thermostats and zone terminal schedules based on occupancy schedules if the occupancy schedule is Schedule:Compact type as they are easy to write and review.
For complex schedules,an EMS program for sliding thermostats which turn on and off terminal likes sliding thermostats would be easily modified by adding EMS sensors for Zone people number then set both availability and thermostats setpoint schedules in according to the zones people numbers. I was able to keep PTAC and PTHP turned off based on a specific condition but I think it's overkilled.
Last, most of zone HVAC devices have Availability Manager List Name which could apply System Availability Managers - it would be the best readable option but I did not try if it works with Zone Terminal Equipment Objects like PTAC or PTHP
Note: The Occupancy Schedules applied for each zone are Fraction or number of people types. Would be interested in better approach

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Asked: 2019-01-28 11:27:01 -0500

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Last updated: Jan 29 '19