Jenny's profile - activity

I'm a student Engineer and I am new with EnergyPlus. I am doing a simulation to obtain the heating and cooling loads in peak winter and summer conditions. I am doing the simulation setting through the class: "SizingPeriod:DesignDay" the worst winter day (by considering no internal heat gains and no solar radiation) and the worst summer day(by considering internal and solar heat gains). The building has two thermal zones and the HVAC system is ideal.

I do not know how to proceed. The first question is: since, as prescribed by the UNI EN 12831 for a winter design day, I should set a constant temperature throughout the day (-8°C for my location), where I can set this value (and also considering solar radiation equal to zero)? Should I not use the Weather File? Moreover, Should I consider the design day in the SizingPeriod class or set it also in the section RunPeriod (by selecting also system sizing)?

The last question is: Can I run a simulation for these two different days and obtaining the required values of cooling and heating loads or should I run them separately?

How to calculate incident solar radiation rate for shading surfaces Does EnergyPlus calculate the solar radiation also f

Hi Adam, thank you for your answer. I will try to do as you said. The problem is that I must classify the PV module as a

Hi Adam, thanks you for your answer. I will try to do as you said. The problem is that I must classify the PV module as

How to calculate incident solar radiation rate for shading surfaces Does EnergyPlus calculate the solar radiation also f

Hi Adam, thank you for your response. I will try to do as you said. The problem is that I must classify the PV module as

Solar radiation on shading surfaces Does EnergyPlus calculate the solar radiation also for shading surfaces? My purpos

Solar radiation on shading surfaces Does EnergyPlus calculate the solar radiation also for shading surfaces? My purpos

solar radiation on shading surfaces Does EnergyPlus calculate the solar radiation also for shading surfaces? My purpos

solar radiation on shading surfaces Does EnergyPlus calculate the solar radiation also for shading surfaces? My purpos

solar radiation on shading surfaces Does EnergyPlus calculate the solar radiation also for shading surfaces? My purpos

I did as it is written in the first answer.

Thank you Aaron and sorry for my delay. I found your answer very useful and I succeded to perform a simulation taking i

I want to include the effect of ventilation in my simulation. A real mechanical ventilation system does not exist yet in the building I am considering. However I want to take into consideration this effect without sizing a real system. What I only know is that I should change something here C:\fakepath\Ventilation.PNG, but I do not know what type of ventilation to choose between natural, intake etc (I do not have any information concerning fan pressure rise etc..). My purpose is to consider in what extent "ventilation" affects the cooling and heating needs of my building and so the electrical consumption without the presence of a real mechanical ventilation system.

I set a SingleHeating and SingleCooling ThermostatSetPoint and so the HVAC system is set to 1 and 2 depending on the per

Yes, I am using the Ideal Loads Air System. Since there is no real mechanical ventilation system, I am considering a "fi

Yes, I am using the Ideal Loads Air System. Since there is no real mechanical ventilation sysem I am considering a "fict

I set a SingleHeating and SingleCooling ThermostatSetPoint and so the HVAC system is set to 1 and 2 depending on the per

Yes, I am using an Ideal Loads Air System. Since there is no real mechanical ventilation sysem I am considering a "ficti

I set a singleHeating and SingleCooling ThermostatSetPoint and so the HVAC system is set to 1 and 2 depending on the per

EnergyPlus: how ventilation affects heating and cooling needs I want to include the effect of ventilation in my simulati

Simulation including ventilation I want to include the effect of ventilation in my simulation. A real mechanical ventila

EnergyPlus: Control of temperature increase I noticed that in some hours, the indoor temperature of my building model ri

Control of temperature increase I noticed that in some hours, the indoor temperature of my building model rises up too m

Some warnings are displayed in my simulation in EnergyPlus. First of all, I am wondering if I can ignore them, since no errors are present or I should check my simulation beacuse warnings may affect it.

In the case these warnings are to be considered : in the section Schedule:Compact I set for example the functioning of some electrical equipment. They are working only on WeekDays, during August and weekends I set them equal to zero. Here it is attached an example of what I performed: C:\fakepath\electric_equipment.PNG

The warning is the following: " ProcessScheduleInput: Schedule:Compact="ELECTRIC EQUIPMENT" has missing day types in Through=7/31 * ~~~ * Last "For" field=FOR: WEEKENDS * ~~~ * Missing day types="Holiday","SummerDesignDay","WinterDesignDay","CustomDay1","CustomDay2" * ~~~ * Missing day types will have 0.0 as Schedule Values" ".

Should I specify the functioning also in these days? I am setting up the operation only in the weekdays so I though it was enough.

Thank you a lot for your help!

Thank you a lot for your answer! I solved the problem.

Control of temperature increase I noticed that in some hours, the indoor temperature of my building model rises up too m

Simulation including ventilation I want to include the effect of ventilation in my simulation. A real mechanical ventila

Yes but what makes me wonder is if the SummerDesignDay refers to the Weatherfile and if it is linked to it. If yes, (imp

Thank you, you answer has been very valuable.

A warning is displayed in my simulation in EnergyPlus :

"GetSurfaceData: Construction DIVIDER WALL of interzone surface SURFACE 3 does not have the same materials in the reverse order as the construction DIVIDER WALL of adjacent surface SURFACE 16 * ~~~ * ...but Nominal U values are similar, diff=[0.0000] ... simulation proceeds. * ~~~ * ...if the two zones are expected to have significantly different temperatures, the proper "reverse" construction should be created ".

What does it mean? How can I solve it?

Sorry, thank you a lot for your suggestions.

Warnings: Schedule Some warnings are displayed in my simulation in EnergyPlus. First of all, I am wondering if I can ign

Warning: Schedule: missing day types Some warnings are displayed in my simulation in EnergyPlus. First of all, I am wond

EnergyPlus Warning: reverse order construction A warning is displayed in my simulation in EnergyPlus : "GetSurfaceData: