MiguelPereira's profile - activity

I have been using HVACTemplate:Zone:IdealLoadsAirSystem, not the actual ZoneHVAC:IdealLoadsAirSystem object. I believe t

I have been using the IdealLoadsAirSystem to model heating and cooling of a building. My question Is, is it possible to limit heating/cooling capacity only during certain periods of the simulation?

Specifically, I am trying to limit capacity during weekends, while keeping it unlimited during weekdays. Since the IdealLoadsAirSystem only has one parameter for heating/cooling capacity and it seems to be a fixed value for the whole simulation, and since I can't, to my knowledge, assign more than one IdealLoadsAirSystem object to the same zone, what would be the best way to accomplish what I am trying to do?

Variable heating/cooling capacity limits? I have been using the IdealLoadsAirSystem to model heating and cooling of a bu

IdealLoads Supply Air Load not equal to Zone Load + Outdoor Air Load Hi. I'm using the HVACTemplate:Zone:IdealLoadsAirSy

Hi.

I am using IdealLoadsAirSystem to simulate an ideal system with heating, cooling, and dehumidification (latent cooling).

Post-simulation, I can apply the COP and EER of a heat pump to the sensible heat results if I want to estimate more realistic sensible loads. How would I do a similar thing for the latent cooling component, being that a dehumidifier's efficiency is usually rated as liters of water removed per kilowatt-hour of energy consumed (i.e. energy factor)?

Is there a default energy factor value that EnergyPlus uses for the IdealLoadsAirSystem?

Thanks in advance.

My total conditioned area is approximately 60 square metres, and I'm only dehumidifying down to 50% relative humidity. T

My total conditioned area is approximately 60 square metres, and I'm only dehumidifying down to 50% relative humidity. T

By doing just "[latent cooling load (kJ)]* [1 / latent heat of water (kJ/kg)] * [1 / density of water (kg/m3)] * [1000 (

By doing just "[latent cooling load (kJ)]* [1 / latent heat of water (kJ/kg)] * [1 / density of water (kg/m3)] * [1000 (

By doing just "[latent cooling load (kJ)]* [1 / latent heat of water (kJ/kg)] * [1 / density of water (kg/m3)] * [1000 (

By doing just "[latent cooling load (kJ)]* [1 / latent heat of water (kJ/kg)] * [1 / density of water (kg/m3)] * [1000 (

"You'll need to calculate the amount of water removal from the latent load." - could you please elaborate on how to do t

Thanks for your reply! My problem when trying to solve your expression is that I do not know the energy factor that the

Energy factor of the dehumidifier in IdealLoadsAirSystem Hi. I am using IdealLoadsAirSystem to simulate an ideal system

Hi!

I am using HVACTemplate:IdealLoadsAirSystem in EnergyPlus to estimate the heating and cooling loads to keep all zones within a building between 20 and 25 degrees Celsius.

For the time being, I have both the humidification and dehumidification control types set to None. However, looking at the output variables, I notice that DistrictHeating and DistrictCooling do not equal the Sensible Heating and Cooling being reported.

Sensible heating is reported at 973 kWh while DistrictHeating is at 977 kWh - this might seem negligible, but I am particularly concerned about sensible cooling being reported at 2745 kWh while DistrictCooling is at 3122 kWh - almost a 15% difference!

This leaves me with considerable amounts of Latent Cooling and some amounts of Latent Heating being reported - which in my understanding should not happen since humidification and dehumidification controls are both turned off.

Turning dehumidification ON does increase latent cooling loads considerably (sensible cooling loads remains exactly the same), but turning it off does not set latent cooling to zero.

So my question is, what are some possible sources (besides dehumidification) for the existence of latent cooling in the results?

Many thanks in advance.

@MJWitte Those variables do add up to District Heating/Cooling. I am trying to figure out if that line in the Reference

Latent cooling with no dehumidification Hi! I am using HVACTemplate:IdealLoadsAirSystem in EnergyPlus to estimate the h

@Avi I am not modelling infiltration, but I am modelling natural ventilation from open windows, which the Sensible Heat

The values I referenced are for OutdoorAir set to None. With OutdoorAir set to 0.00944 m3/s Flow per person, there's e

Latent cooling with no dehumidification Hi! I am using HVACTemplate:IdealLoadsAirSystem in EnergyPlus to estimate the h