OpenBuildings Energy Simulator Pre-configured HVAC Systems

Calculation of Design Energy Cost/Energy Cost Budget and Calculation of the Proposed/Baseline Building Performance.

OpenBuildings Energy Simulator provides pre-configured HVAC systems that can be used for the Calculation of Design Energy Cost/Energy Cost Budget and Calculation of the Proposed/Baseline Building Performance that comply with the ASHRAE 90.1 standard’s Section 11.3 and Appendix G.3.1 requirements. The following table lists all the available pre-configured HVAC systems, information regarding their heating and cooling performance parameters and the equivalent systems types listed in the standard’s modeling requirements for the budget building (Section 11.3.2) and proposed/baseline building (Appendix G3.1.1A and G3.1.1B).

Available Pre-configured HVAC Systems	Heating	Cooling	Standard 90.1 HVAC System
Available Pre-configured HVAC Systems	Heating	Cooling	Section 11, Energy Cost Budget Method (Figure 11.3.2)	Appendix G, Performance Rating Method Noted in the System Description field in OpenBuildings Energy Simulator HVAC Manager. (Tables G3.1.1A and G3.1.1B)
Convective Hot Water Baseboards	Natural gas boiler with convective baseboards	None	N/A	N/A
Fan Coil with Electric Heat	Electric Resistance	Electric Water-Cooled Chiller with 2-speed Cooling Tower	System 5	N/A
Four Pipe Fan Coil	Natural gas hot water boiler, hot water heating coil	Electric Water-Cooled Chiller with 2-speed Cooling Tower	System 7	N/A
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Electric Heat	Four Pipe Fan Coil – Natural gas hot water boiler, hot water heating coil DOAS - Electric heating and preheating coils	Four Pipe Fan Coil – Electric Water-Cooled Chiller with 2-speed Cooling Tower DOAS – Electric DX Cooling	N/A	N/A
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Gas Heat	Four Pipe Fan Coil – Natural gas hot water boiler, hot water heating coil DOAS – Natural gas heating coil, electric preheating coil	Four Pipe Fan Coil – Electric Water-Cooled Chiller with 2-speed Cooling Tower DOAS – Electric DX Cooling	N/A	N/A
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with Hot Water Heat	Four Pipe Fan Coil – Natural gas hot water boiler, hot water heating coil DOAS – Natural gas hot water boiler, hot water heating coil; electric preheating coil	Four Pipe Fan Coil – Electric Water-Cooled Chiller with 2-speed Cooling Tower DOAS – Electric DX Cooling	N/A	N/A
Four-Pipe Fan Coil with Central Ducted DX-based DOAS with HX-Assisted Dehumid and Hot Water Heat	Four Pipe Fan Coil – Natural gas hot water boiler, hot water heating coil DOAS – Natural gas hot water boiler, hot water heating coil; electric preheating coil	Four Pipe Fan Coil – Electric Water-Cooled Chiller with 2-speed Cooling Tower DOAS – Electric DX Cooling, Heat Exchanger-Assisted for improved dehumidification	N/A	N/A
Four-Pipe Fan Coil with Central Ducted Water-Based DOAS	Four Pipe Fan Coil – Natural gas hot water boiler, hot water heating coil DOAS – Natural gas hot water boiler, hot water heating coil; electric preheating coil	Electric Water-Cooled Chiller with 2-speed Cooling Tower	N/A	N/A
Packaged Single Zone AC Air-Cooled DX with Gas Heat	Natural gas heating coil	Electric DX Cooling	System 11	System 3
Packaged Single Zone HP Air-to-Air DX with Electric Supplemental Heat	Electric Heat Pump with Supplemental Electric Heat Coil	Electric Heat Pump	System 9	System 4
PTAC Air-Cooled DX with Electric Heat	Electric Heating Coil	Electric DX Cooling	N/A	N/A
PTAC Air-Cooled DX with Gas Heat	Natural gas heating coil	Electric DX Cooling	N/A	N/A
PTAC Air-Cooled DX with Hot Water Heat	Natural gas hot water boiler, hot water heating coil	Electric DX Cooling	System 10	System 1
PTAC Air-Cooled DX with Electric Heat and Central Ducted DOAS	Electric Heating Coil	Electric DX Cooling	N/A	N/A
PTAC Air-Cooled DX with Gas Heat and Central Ducted DOAS	Natural gas heating coil	Electric DX Cooling	N/A	N/A
PTHP Air-to-Air DX with Electric Supplemental Heat	Electric Heat Pump with Supplemental Electric Heating Coil	Electric Heat Pump	System 8	System 2
PTHP Air-to-Air DX with Gas Supplemental Heat	Electric Heat Pump with Supplemental Natural Gas Heating Coil	Electric Heat Pump	N/A	N/A
PTHP Air-to-Air DX with Electric Supplemental Heat and Central Ducted DOAS	PTHP - Electric Heat Pump with Supplemental Electric Heating Coil DOAS – Electric heating and preheating coils	Electric DX Cooling	N/A	N/A
PTHP Air-to-Air DX with Gas Supplemental Heat and Central Ducted DOAS	PTHP - Electric Heat Pump with Supplemental Natural Gas Heating Coil DOAS – Natural gas heating coil, electric preheating coil	Electric DX Cooling	N/A	N/A
Packaged VAV Air-Cooled DX with Gas Heat and Electric Reheat	Natural gas heating coil	Electric DX Cooling	N/A	N/A
Packaged VAV Air-Cooled DX with Hot Water Heat	Natural gas boiler, hot water heating and reheat coils	Electric DX Cooling	System 4	System 5
Packaged VAV Air-Cooled DX with PFP Boxes and Electric Heat	Electric heating coil	Electric DX Cooling	System 3	System 6
VAV with PFP Boxes Water-Cooled Chiller and Electric Heat	Electric heating and reheat coils	Electric Water-Cooled Chiller with 2-speed Cooling Tower	System 1	System 8
VAV with SFP Boxes Water-Cooled Chiller and Electric Heat	Electric heating and reheat coils	Electric Water-Cooled Chiller with 2-speed Cooling Tower	N/A	N/A
VAV with SFP Boxes Water-Cooled Chiller and Hot Water Heat	Natural gas hot water boiler, hot water heating coil	Electric Water-Cooled Chiller with 2-speed Cooling Tower	N/A	N/A
VAV with Water-Cooled Chiller and Hot Water Heat	Natural gas hot water boiler, hot water heating coil	Electric Water-Cooled Chiller with 2-speed Cooling Tower	System 2	System 7
Warm Air Furnace with Electric Heat	Electric heating coil	None	.	System 10
Warm Air Furnace with Gas Heat	Natural gas heating coil	None	.	System 9
Water-Source Heat Pump	Hybrid Electric Evaporative Fluid Cooler, Natural Gas Boiler	Electric Heat Pump	System 6	N/A

Tip: The budget building and baseline buildings can be created at simulation time using the controls found on the Calculate tab of the Simulation dialog. There is also and option to create baseline buildings (ASHRAE 90.1 - 2004 and 2007 baseline buildings) on the pop-up menu associated with the Building object in the OpenBuildings Energy Simulator Project Tree dialog.

Tip: Pre-configured HVAC systems must be added to your building design using the HVAC Manager dialog’s options and settings. For more information on how to use the HVAC Manager dialog, see the HVAC Manager tool step by step procedures.

Note: OpenBuildings Energy Simulator also provides pre-configured Service Water Heating systems for the Calculation of Design Energy Cost/Energy Cost Budget and Calculation of the Proposed/Baseline Building Performance.