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A question about the example in Energyplus 8.7——ZoneCoupledKivaSlab.idf ZoneCoupledKivaSlab.idf is a example Energyplus8

Thanks for your suggestion, I have used the foundation Kiva and the result is improved， I will go on adjusting. Many tha

Why both the heating and cooling load are reduced when decrease the thickness of ground slad in cold region? When I used

When I define the ground surface temperature based on the handbook that 2C less than the indoor temperature, the thickness showed a positive correlation with Heating energy comsumption, and heat conductivity coefficient showed a negative correlation with heating energy in a severe cold region. It seems that the ground has a heating effect. That is abnormal, so dose anyone has encontered the some problem or how to change it.

The problem about the setting of ground surface temperature When I define the ground surface temperature based on the h

Whose heating or cooling energy consumption is bigger, first floor or middle floor? Hey guys, I have a question about th

How to reduce the impact of SHGC on energy consumption Recently， I made a sensitivity analysis on building energy heatin

The defination of infiltration is the outside air from the crack of building. So, how to set the infiltration rate in a central zone which is composed by internal walls. Theoretically, there is no direct outdoor air to go into this area, but the mixture of indoor and outdoor air. How about setting a smaller value than common situation? or set zero in this situation?

Does anyone have seen the fatal error of Number of ObjectDef Numeric Args> Size of NumericArg array when apply the fu

Thanks for your answer, but for a non-perimeter zone, how to define its infiltration (flow/zone) value. Have you ever se

How to define the infiltration rate in a central zone which is composed by internal walls? The defination of infiltratio

How to define the infiltration flowrate in a central zone which is composed by internal wall? The defination of infiltra

Thank you for the reply, but forgive that I'm not the HVAC major. I used ideal loads air system in my project, and I have to set the design specification : outdoor air. whether you mean that this OA is arise the mechanical ventilation and will result in the change of space cooling and heating.

For infiltration， it is the outdoor air from the crack of building envelop. But the define of design specification outdoor air is confused? Do they have any relationship? Many thanks

Sorry to ask a primary question. I simulate the building model using Ideal loads air system with outdoor air. In the beginning, I considered the districting cooling and heating energy as the cooling and heating energy requirements. However, when I sum all zones cooling and heating energy (Output:Variable:Zone Ideal Loads Zone Total Cooling Energy),the result has a big difference from district cooling and heating as follow.

I can understand the zone total cooling energy is bigger than district cooling because the outdoot air.But in the winter, the outdoor air should also enlarges the zone total heating energy which ought to bigger than district heating. However the result is opposite. In additional, If the district cooling and heating is the heating and cooling energy requirements, then how to statistics each zone' s heating and cooling energy requirements.

Thank you for your helps, rely on your suggestions, I have solved my problems

The error report show that,

1. * Warning * Calculated design heating load for zone=F1-ADDITIONAL is zero.

   * ~~~ * Check Sizing:Zone and ZoneControl:Thermostat inputs.

2. * Warning * SizeDXCoil Coil:Cooling:DX:VariableRefrigerantFlow ADDITIONAL-1 VRF DX COOLING COIL

   * ~~~ * ...Gross Rated Total Cooling Capacity [W] will be limited by the minimum rated volume flow per rated total capacity ratio.

   * ~~~ * ...DX coil volume flow rate (m3/s ) = 1.241784 * ~~~ * ...Requested capacity (W ) = 36544.966 * ~~~ * ...Requested flow/capacity ratio (m3/s/W ) = 3.397E-005 * ~~~ * ...Minimum flow/capacity ratio (m3/s/W ) = 4.027E-005 * ~~~ * ...Adjusted capacity ( W ) = 30836.470 I have checked sizing zone and zone control:thermostat, but I fial to solve this problem.

Any suggestion is appreciative

I use the ideal air loads system to siumlate the building load, the result shows a big difference between district cooling and heating as follow:

There no big apparent unreasonable sets in the model, So whether this difference arises from the ideal air loads system?

I used openstudio to build the building model and simulate in energyplus, but this project has some errors as follow: * Severe * IP: IDF line~13 Multiple occurrences of Unique Object=Version * Severe * IP: Other miscellaneous errors found in input * Severe * IP: Out of "range" values and/or blank required fields found in input * Fatal * IP: Errors occurred on processing IDF file. Preceding condition(s) cause termination. I'm a new user, so if anyone could give me some advices, many thanks.

Thank you for your help， I will change it and check the result. But I always have another question for thermal zone. That is whether I can set two zones which locate in different storeys into a same thermal, or I can just set the zone in same storey to the same thermal zones.

When I run the simulation in E+, there is always a warning as follows:

Warning ** GetSurfaceData: InterZone Surface Areas do not match as expected and might not satisfy conservation of energy:
   **   ~~~   **   Area=306.2, Multipliers=1, Total Area=306.2 in Surface=SURFACE 12 Zone=THERMAL ZONE 1
   **   ~~~   **   Area=306.2, Multipliers=3, Total Area=918.7 in Surface=SURFACE 53 Zone=THERMAL ZONE 2

I want to know how I can fix this problem?

In fact ,there is a opening between two zones in my model, and I hope this opening has the funcation of air exchange and transparency. So, I draw a open area in SU between two zones, but the result is unsatisfactory. So I want to know how to modify this model to make the result more reasonable.

I had met this situation before, you need redraw the you model, maybe there are some problems from your drawing method which conflicts with OS' s drawing language.

It doesn‘t matter in OS, I think, because you can change the details in E+

In my view, you can try to reset the maximum surface convection heat transfer coefficient value to the default value 1000. I'm not sure whether this method can solve your problem, just a suggestion.

Thanks for your help. I will try your suggestion as soon as possible.

Recently, I make an example to analyze the atrium energy performance. One of my tasks is to study the effect of daylighting on lighting energy performance, and I set the parameter according to the examples in E+. But I can't find the maeningful result from the output.Maybe there are some errors in my setup, but I'm not sure about it. So, I ask this question here.(Ps. the targrt zone is ad5

Sometimes, there is no internal wall between two zones, but just a opening. So, how to describe this are in SU with legacy open studio. Though I can draw this situation in SU software, I'm not sure whether this method accord with the principle of software