Inadequate Dehumidification Issue with Custom DOAS + VRF System Under 2090 Future Climate (OpenStudio)
Hi everyone,
We are a team of 3rd-year undergraduate students currently struggling with a building energy simulation project. We are analyzing the climate resilience of a modern residential building under a 2090 future climate scenario, but we have hit a critical roadblock regarding humidity control.
[Our Simulation Environment]
Software: OpenStudio Application (with EnergyPlus Engine)
Weather File: A future climate .epw file generated via the Future Weather Generator tool (reflecting extreme high-temperature and high-humidity summer conditions for Seoul, 2090).
Model File: Attached as THIRDDOAS.osm.
HVAC System: A custom DOAS (Dedicated Outdoor Air System) + VRF system that we configured manually within the interface.
[The Problem] Despite the extremely high outdoor humidity in the 2090 weather data, proper outdoor air dehumidification is not occurring. As a result, the indoor relative humidity remains unacceptably high during the cooling season. It seems like the cooling/dehumidification coil on our DOAS air loop is not triggering or modulating based on the latent load.
[Our Request] If our current custom HVAC configuration is inherently flawed, could you please provide a very detailed, step-by-step guideline on how to properly construct a DOAS loop for rigorous dehumidification control in the OpenStudio HVAC Systems tab?
Since we are OpenStudio beginners, high-level theory or complex academic terms are very difficult for us to understand. Could you please guide us with a very simple, button-by-button, step-by-step tutorial on how to set up the DOAS loop for dehumidification?
We would really appreciate it if you could explain it like this:
"Go to X tab ➔ Click Y button ➔ Drag Z component into the loop."
Specifically, please show us the exact mouse clicks for:
Which exact Setpoint Manager to drag from the library, and which specific node to drop it on.
Where to click in the Thermal Zones tab to turn on the humidity sensor (Humidistat) for our rooms.
If we need to change any numbers in the Air Terminal settings to enable dehumidification, please tell us exactly which line to type them in.
We are just 3rd-year university korea students trying our best, but we are completely stuck. A beginner-friendly, visual guide would save our project. Thank you so much!
https://drive.google.com/file/d/17ib3...
We are working around the clock to finish this project, but we are running out of options. Any detailed guidance or a review of our .osm file would be immensely appreciated.
Thank you so much for your time and help!
