Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

asked 2016-03-23 17:54:19 -0600

Yannis's avatar

Modeling a Standard Split AC with economizer

I followed the steps in the question "hvac template for standard split ac" to build up a standard split system according to the technical data: http://www.inventorairconditioner.com/air-conditioners/home/wall-mounted/mini-split-apsi-apso-24/

The only changes I made from the default are:

Unitary - Single Speed DX cooling - Cycling - Elec reheat

  • OS:AirLoopHVAC:UnitarySystem

Controlling Zone or thermostat location: Τhe relevant zone

  • OS:Coil:Cooling:DX:SingleSpeed

Rated Total Cooling Capacity: 6156 W

Rated COP: 3.24

  • OS:Coil:Heating:Electric

Nominal Capacity: 6498 W

Diffuser

  • OS:AirTerminal:SingleDuct:Uncontrolled

Maximum Air Flow Rate: 0.236 m3/s (Air Circulation 850 CMH Max)

My first question is if my settings are correct according to the technical data?

The second Question is according to openstudio results summary. Using a Unitary - Single Speed DX cooling - Cycling - Elec reheat system the total calculated power consumption for cooling or heating is cooling/heating+fans consumption?

The third question is if I can model an economizer, since the relevant zone is a IT room/Data center space and what are the appropriate settings for an economizer for such a space so as to estimate possible changes in energy consumption

Thanks!

click to hide/show revision 2
retagged

updated 2016-03-24 10:10:37 -0600

Neal Kruis's avatar

Modeling a Standard Split AC with economizer

I followed the steps in the question "hvac template for standard split ac" to build up a standard split system according to the technical data: http://www.inventorairconditioner.com/air-conditioners/home/wall-mounted/mini-split-apsi-apso-24/

The only changes I made from the default are:

Unitary - Single Speed DX cooling - Cycling - Elec reheat

  • OS:AirLoopHVAC:UnitarySystem

Controlling Zone or thermostat location: Τhe relevant zone

  • OS:Coil:Cooling:DX:SingleSpeed

Rated Total Cooling Capacity: 6156 W

Rated COP: 3.24

  • OS:Coil:Heating:Electric

Nominal Capacity: 6498 W

Diffuser

  • OS:AirTerminal:SingleDuct:Uncontrolled

Maximum Air Flow Rate: 0.236 m3/s (Air Circulation 850 CMH Max)

My first question is if my settings are correct according to the technical data?

The second Question is according to openstudio results summary. Using a Unitary - Single Speed DX cooling - Cycling - Elec reheat system the total calculated power consumption for cooling or heating is cooling/heating+fans consumption?

The third question is if I can model an economizer, since the relevant zone is a IT room/Data center space and what are the appropriate settings for an economizer for such a space so as to estimate possible changes in energy consumption

Thanks!

Modeling a Standard Split AC with economizer

I followed the steps in the question "hvac template for standard split ac" to build up a standard split system according to the technical data: http://www.inventorairconditioner.com/air-conditioners/home/wall-mounted/mini-split-apsi-apso-24/

The only changes I made from the default are:

Unitary - Single Speed DX cooling - Cycling - Elec reheat

  • OS:AirLoopHVAC:UnitarySystem

Controlling Zone or thermostat location: Τhe relevant zone

  • OS:Coil:Cooling:DX:SingleSpeed

Rated Total Cooling Capacity: 6156 W

Rated COP: 3.24

  • OS:Coil:Heating:Electric

Nominal Capacity: 6498 W

Diffuser

  • OS:AirTerminal:SingleDuct:Uncontrolled

Maximum Air Flow Rate: 0.236 m3/s (Air Circulation 850 CMH Max)

My first question is if my settings are correct according to the technical data?

The second Question is according to openstudio results summary. Using a Unitary - Single Speed DX cooling - Cycling - Elec reheat system the total calculated power consumption for cooling or heating is cooling/heating+fans consumption?

The third question is if I can model an economizer, since the relevant zone is a IT room/Data center space and what are the appropriate settings for an economizer for such a space so as to estimate possible changes in energy consumption

Thanks!

click to hide/show revision 4
retagged

updated 2016-03-27 06:42:12 -0600

__AmirRoth__'s avatar

Modeling a Standard Split AC with economizer

I followed the steps in the question "hvac template for standard split ac" to build up a standard split system according to the technical data: http://www.inventorairconditioner.com/air-conditioners/home/wall-mounted/mini-split-apsi-apso-24/

The only changes I made from the default are:

Unitary - Single Speed DX cooling - Cycling - Elec reheat

  • OS:AirLoopHVAC:UnitarySystem

Controlling Zone or thermostat location: Τhe relevant zone

  • OS:Coil:Cooling:DX:SingleSpeed

Rated Total Cooling Capacity: 6156 W

Rated COP: 3.24

  • OS:Coil:Heating:Electric

Nominal Capacity: 6498 W

Diffuser

  • OS:AirTerminal:SingleDuct:Uncontrolled

Maximum Air Flow Rate: 0.236 m3/s (Air Circulation 850 CMH Max)

My first question is if my settings are correct according to the technical data?

The second Question is according to openstudio results summary. Using a Unitary - Single Speed DX cooling - Cycling - Elec reheat system the total calculated power consumption for cooling or heating is cooling/heating+fans consumption?

The third question is if I can model an economizer, since the relevant zone is a IT room/Data center space and what are the appropriate settings for an economizer for such a space so as to estimate possible changes in energy consumption

Thanks!

Modeling a Standard Split AC with economizer

I followed the steps in the question "hvac template for standard split ac" to build up a standard split system according to the technical data: http://www.inventorairconditioner.com/air-conditioners/home/wall-mounted/mini-split-apsi-apso-24/

The only changes I made from the default are:

Unitary - Single Speed DX cooling - Cycling - Elec reheat

  • OS:AirLoopHVAC:UnitarySystem

Controlling Zone or thermostat location: Τhe relevant zone

  • OS:Coil:Cooling:DX:SingleSpeed

Rated Total Cooling Capacity: 6156 W

Rated COP: 3.24

  • OS:Coil:Heating:Electric

Nominal Capacity: 6498 W

Diffuser

  • OS:AirTerminal:SingleDuct:Uncontrolled

Maximum Air Flow Rate: 0.236 m3/s (Air Circulation 850 CMH Max)

My first question is if my settings are correct according to the technical data?

The second Question is according to openstudio results summary. Using a Unitary - Single Speed DX cooling - Cycling - Elec reheat system the total calculated power consumption for cooling or heating is cooling/heating+fans consumption?

The third question is if I can model an economizer, since the relevant zone is a IT room/Data center space and what are the appropriate settings for an economizer for such a space so as to estimate possible changes in energy consumption

Thanks!

EDIT-------------------------------------------------------------------

The following error occurs:

"Error: Sizing: Coil:Cooling:DX:SingleSpeed "1SPD DX CLG COIL 7": Rated air volume flow rate per watt of rated total cooling capacity is out of range. Min Rated Vol Flow Per Watt=[4.027E-005], Rated Vol Flow Per Watt=[8.196E-005], Max Rated Vol Flow Per Watt=[6.041E-005]. See Input Output Reference Manual for valid range."

When all set to default (autosize), no error occured. Acording to the technical data, is it posible to be overrided this error?

About | Help | Privacy | Legal | Contact
Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.
Powered by