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which program is used to make these drawings? I'd like to draw the composition of the walls using these designs I've see

I'm using GenOpt coupling with EnergyPlus to minimize the LCC but this variable that I need to minimize doesn't appear i

yes, but the actual system (mini split) is Oversized, so my VRF is smallest 1,299,985 btu vs 906,800 btu.

Comparison between a building using Ductless Mini Splits and VRF system resulted in 63% less power consumption in HVAC e

Comparison between a building using Ductless Mini Splits and VRF system resulted in 63% less power consumption in HVAC e

Thank you! The problem was the pressure.

I'm using the Fan:ConstantVolume, the Availability Schedule I'm using is always 1, but I already verify that the fan is

I'm using the Fan:ConstantVolume, the Availability Schedule I'm using is always 1, but I already verify that the fan is

Energy consumption of fans is as high as the cooling energy consumption when modeling a comercial VRF air conditioner. H

Energy consumption of fans is as high as the cooling energy consumption when modeling a comercial VRF air conditioner. H

Energy consumption of fans is as high as the cooling energy consumption when modeling a comercial VRF air conditioner. H

How to fix these error: "Gross Rated Total Cooling Capacity [W] will be limited by the maximum rated volume flow per rat

In all the Cooling Coils of the Variable Refrigerant Flow System is happening the same error:

* Warning * SizeDXCoil Coil:Cooling:DX:VariableRefrigerantFlow TU7 VRF DX COOLING COIL * ~~~ * ...Gross Rated Total Cooling Capacity [W] will be limited by the maximum rated volume flow per rated total capacity ratio. * ~~~ * ...DX coil volume flow rate ( m3/s ) = 2.347873 * ~~~ * ...Requested capacity ( W ) = 15364.597 * ~~~ * ...Requested flow/capacity ratio ( m3/s/W ) = 1.528E-004 * ~~~ * ...Maximum flow/capacity ratio ( m3/s/W ) = 6.041E-005 * ~~~ * ...Adjusted capacity ( W ) = 38865.635

And as you can see, automatically for to adjust the ratio, the capacity of the coils are almost triplicating.

I'm trying to modeling a commercial split air conditioner and heat pump, specifically the model: 38CQD048535MC of Carrier.

The information available for these model is:

I'm using:

• HVACTemplate: Thermostat
• HVACTemplate:System:Unitary
• HVACTemplate:Zone:Unitary

In the HVACTemplate:System:Unitary, there are a lot of fields that I don't have the values for complete, so I'm using the default values giving by energy plus. In the field heating coil type there are three options: electric, gas and hot water. I'm using electric, but I'm not sure if these is the correct way to model the split when is working like a heat pump. For now, I did these:

I would like to know if what I have done is correct or what is the correct way to model these kind of commercial air conditioners.

I'm trying to calculate the heating rate. The InputOutputReference of 2008 and others documents suggest to use the COMPACT HVAC:ZONE:PURCHASED AIR. But I'm using the version 8.6 of Energy Plus and can't find that class. There is something equivalent in the version 8.6?

During the simulation several errors of this type occur: "The area of the divider exceeds the glass opening for the window". Here is an example using one of the windows:

ERROR:

* Severe * ProcessSurfaceVertices: Divider area exceeds window opening for window WAN_C11WAN * ~~~ * Window surface = [4.38] m2, dividing area = [23.40] m2.

PROOF:

The area of the window is: 9.75 x 0.45 = 4.38 .... Ok The area of the dividers: 0.4 x 0.45 x 6 = 1.08 (the vertical dividers are those parallel to the sides link text

To get the 23.4 m2 that the program gives, I must multiply the width of the divider for the width of the window instead of the height, that sounds wrong to me...

Area according to the program: 0.4 x 9.75 x 6 = 23.4 ...

So, I must enter the vertical dividers (parallels to the sides) like horizontal dividers (parallels to the top)? These is a program mistake or I am wrong??

I realize that I didn't follow those rules when entered the surfaces of the building. I want to know if those rules are related to the direction of the thickness of the walls, and if during de simulation will come any problem.

Thanks

Why when i draw a building in sketchup using openstudio and then export the file as an .idf, in the .dxf file appears diagonals lines that alter the surfaces?

I have a doubt related to the Coordinate System. Looking at the examples files, for instance, the Exercise2C-Solution.idf (see related doc in Getting Started), used Relative, and the origin of all zones is x = 0, y = 0 and z = 0. I don't understand why, agree with me, in that way the Zone Origin coordinates are not specified relative to the Building Origin.

Using any of them (Relative or World), the vertex of the surfaces continues the same?