a burst of humidity in Energyplus
Hi, I would like to input [gH2O/h] in Energyplus simulation to take into account burst of humidity within 9 hours. Thank you.
First time here? Check out the Help page!
Hi, I would like to input [gH2O/h] in Energyplus simulation to take into account burst of humidity within 9 hours. Thank you.
First off, you have many options to define latent moisture gain entering a zone in EnergyPlus. If some electricity consumption causes this latent moisture gain, then you should use the ElectricEquipment object in your input file. There are other objects to use if latent moisture gain is caused by using gas, or as @rraustad pointed out in their answer the OtherEquipment object that will add moisture without consuming any energy.
No matter what option you use to define the latent moisture gain, you cannot directly define moisture addition to a zone in terms of water mass rate like $g_{water}/hr$. You will instead need to define multiple inputs that will together set this water mass rate gain:
The basic calculation for the "power" of latent gain into a zone is:
$$ Power_{latent} = \dot{m}_{water}*h_{fg} $$
Where $h_{fg}$ is the heat of vaporization of water (2256 $\frac{kJ}{kg}$ at 100 $^oC$). So, you should multiply your desired $g_{water}/hr$ by $h_{fg}$ to calculate the equivalent $W$ of latent gain to enter as an EnergyPlus input for Design Level.
thank you so much this is so hopeful @Aaron Boranian
You could use the OtherEquipment
object with a Latent Fraction = 1 to add moisture to a zone based on a schedule.
OtherEquipment,
MoistureInjector, !- Name
None, !- Fuel Type
ZONE ONE, !- Zone or ZoneList Name
MySchedule, !- Schedule Name
EquipmentLevel, !- Design Level Calculation Method
352, !- Design Level {W}
, !- Power per Zone Floor Area {W/m2}
, !- Power per Person {W/person}
1, !- Fraction Latent
0, !- Fraction Radiant
0; !- Fraction Lost
thank you sir but i didn't find any column to put 500g/h how can convert g/h to watt?
Please start posting anonymously - your entry will be published after you log in or create a new account.
Asked: 2020-07-24 12:15:41 -0600
Seen: 533 times
Last updated: Jun 25 '21
What causes this burst of humidity? Is it a water draw like a shower or sink connected to a domestic hot water system or something similar? Is it something inside of a zone that uses electricity or gas? More information would be helpful.
i want to validate an experimental results; it just a an increase of humidity in the zone!!!