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HAP v4.4 Introduces LEED® and Quick Energy Analysis Features |
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LEED® EA Credit 1 Analysis Just Got Easier with HAP v4.4 |
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HAP v4.4 greatly reduces the labor involved in LEED NC-2.2 Energy and Atmosphere Credit 1 analysis by tailoring software features to specific process and calculation requirements defined in ASHRAE Standard 90.1-2004 Appendix G. Labor saving enhancements include:
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| | This report mimics the format and content of the LEED NC-2.2 on-line submittal for EA Credit 1. Specifically it provides data found in the following sections of the template:
• 1.1 - General Information
• 1.3 - Advisory Messages
• 1.5 - Energy Type Summary
• 1.8.1 - Baseline Performance
• 1.8.1(b) - Baseline Energy Costs
• 1.8.2 - Performance Rating Table
• 1.8.2(b) - Energy Cost and Consumption by Type
The report provides significant labor savings by
• Eliminating labor needed to assemble the energy consumption and energy cost data from separate sources. The report automatically provides all necessary data in one place. |  | | • Facilitating quick, efficient evaluation of energy and energy cost performance. | Click for larger image. | • Facilitating quick evaluation of window-to-wall ratio, unmet load hours and % process cost.
• Streamlining effort needed to enter data in the LEED EAc1 on-line submittal template. By formatting data in the report in the same manner as the template, data can be easily transferred from the report into the submittal template. | |
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| | The new "Duplicate Building (with Spaces and HVAC Eqpt)" feature streamlines creation of the "Baseline - 0 Degree" building.
Once the Proposed Building has been defined, this feature can be used to make a copy of the building and all its air systems, plants, plant components and spaces. Global search and replace features can then be used to morph the space data into Baseline spaces by inserting prescriptive wall, roof and window assemblies and to apply prescriptive values for lighting. |  | | Systems, plants and plant components can be edited to adjust properties to match prescriptive requirements and requirements listed in ASHRAE Standard 90.1-2004 Appendix G. The result is creation of a "Baseline - 0 Degree" building much faster than if all elements had to be manually input. | |
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| | | The new "Perform LEED (90.1 PRM) Rotations" feature allows you to generate the "Baseline - 90 Degree", "Baseline - 180 Degree", and "Baseline - 270 Degree" buildings in a matter of seconds. |  | Once you've created the "Baseline - 0 Degree" building, simply select the "Perform LEED Rotations" option, click OK and the program does the rest of the work.
100% of the labor involved in manually creating the three Baseline rotations is eliminated. |  | | Click for larger image. |
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| | | HAP v4.4 provides new options for automatically assigning equipment capacity. "Autosizing" features are offered for cooling plants, heating plants, DX cooling equipment, DX heat pumps and combustion heating equipment. The feature also allows specification of the amount of oversizing for easy compliance with the ASHRAE Standard |  | | 90.1-2004 Appendix G requirement that Baseline Building cooling equipment be sized at peak load plus 15% and Baseline Building heating equipment be sized at peak load plus 25%. This feature eliminates the labor required to manually define required Baseline Building equipment capacities. | |
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| | | Compliance with ASHRAE Standard 90.1-2004 Appendix G requirements for modeling Baseline Building fan performance is also vastly easier in HAP v4.4. The program provides an option to automatically determine fan performance via the procedure in Appendix G section 3.1.2.9 and to model part-load performance of VAV fans using the fan curve from Appendix G table 3.1.3.15. These options eliminate the labor needed to manually determine the Baseline system fan kW allowance and to manually define the required VAV part-load performance. |  |
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| | | To comply with the Appendix G modeling requirements for fan powered mixing box air terminals, the program allows fan performance to be specified in terms of W/CFM. |  |
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| | For DX cooling and heating equipment, HAP accepts performance inputs in terms of EER and COP so matching prescriptive requirements for Baseline equipment is easy. Defining performance for Proposed equipment is simple as well.
During energy simulations HAP automatically derives the compressor or compressor + outdoor fan kW values from the specified EER or COP, using the applicable ARI or ISO/ARI standard, and correcting both for supply fan watts and cases where |  | the specified OADB or EWT design point differs from the standard design point.
This eliminates the need for a user to perform these conversions manually. | |
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| | When defining performance for PTACs, PTHPs or WSHPs the program offers an "all terminal units use same settings" option to streamline input.
For example, when defining WSHP equipment performance for a Baseline building, you can select |  | | this option and then specify one set of specifications for autosizing and the prescriptive EER or COP. HAP will then automatically apply these specifications to all zone WSHP units in the system. This eliminates the effort needed to define performance for each WSHP unit separately. | |
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| | To comply with Appendix G modeling requirements for Baseline building chilled water and hot water plants, the program allows pump performance to be specified in terms of W/gpm.
This eliminates the need to manually convert W/gpm specifications into pump head or kW values. |  |
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| Quickly Screening Designs with HAP v4.4 Wizard Features |
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The way we design buildings is rapidly changing today. The desire to create sustainable designs, achieve LEED certification and improve project efficiency through Building Information Modeling (BIM) are fostering increased collaboration among participants early in the project lifecycle. A key element in optimizing designs early in the project is the ability to quickly screen design alternatives, comparing energy use or energy cost, to identify designs with the greatest potential for energy efficiency or for LEED EAc1 points. HAP v4.4 supports this work through its expanded "wizard" features that allow energy simulation models to be generated and compared in a matter of minutes.
The "wizard" features in HAP v4.4 guide you through the process of creating a building and its HVAC systems. The wizard asks a short series of high level questions about the size, shape and use of the building, and the type, features and configuration of the HVAC equipment. Based on the high level inputs, the software applies intelligent defaulting to automatically construct a complete, detailed virtual model for simulation. With this approach a building and multiple HVAC design alternatives can be rapidly configured. Specific wizard features include:
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- A Building Wizard for creating a building thermal model. Define the building footprint and zoning, the number of floors, the envelope assemblies and the space usage type, and the program then automatically generates a set of detailed space definitions for the entire building.
- An Equipment Wizard for configuring HVAC equipment scenarios. Specify the equipment type, key features and components and its configuration, and the program then automatically generates a set of air system, plant, chiller, cooling tower and boiler definitions for the building.
- A Full Wizard Session feature ties the Building and Equipment wizards together so you can create the building and multiple HVAC equipment scenarios all at one time.
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| | The Building Wizard helps you rapidly create a thermal model of a complete building.
The first Wizard screen asks high level questions about the building type, the footprint shape, size and zoning, and the number of floors. A building footprint diagram helps you visualize the building you're creating. Summary data provides instant feedback on the floor area, wall area and window area for the building. |  | | Click for larger image. | | | | The second Building Wizard screen allows definition of the envelope assemblies, internal loads, ventilation and infiltration.
• Assemblies can be selected from a list of default types, or custom assemblies you previously created.
• Schedules for internal loads can be selected from a list of typical schedules from ASHRAE Standard 90.1-2004 or custom schedules you previously created.
• Ventilation requirements can be defaulted from one of the ASHRAE Standard 62 or 62.1 editions based on space usage type. Projects can be configured using Standard 62-2001, 62.1-2004 or 62.1-2007 data. |  | | Click for larger image. |
Finally, when you press Finish, HAP uses these high-level inputs to generate a set of detailed space definitions for the entire building. Data that could take hours or even days to create manually can be generated in just a few minutes with the Building Wizard. | |
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| | The Equipment Wizard helps you quickly generate HVAC equipment scenarios for your analysis. The wizard consists of 1, 2 or 3 screens depending on equipment type, plus optional screens for modifying lower level defaults.
The initial wizard screen defines the equipment type, heating source, air-side system type and configuration (e.g., one AHU per floor) and key airside features such as economizer, DCV, and ventilation reclaim.
A system diagram in the lower half of the screen updates with each input to give you immediate visual feedback on the system you are configuring. |  | | Click for larger image. | | | | For chilled water applications, the second wizard screen is used to define the chilled water plant.
Inputs define the number of chillers, chiller type and full load performance along with key features such as the chilled water distribution system type, reset controls, cooling tower fan controls and waterside economizers.
A diagram in the lower portion of the screen updates with each input to provide visual feedback on the plant you are configuring. |  | | Click for larger image. | | | | For hot water or steam applications, a third wizard screen defines the heating plant characteristics.
Inputs include the fuel type, boiler efficiency and hot water distribution system type.
A diagram in the lower portion of the screen updates to provide visual feedback on the plant being configured. |  | | Click for larger image. |
Finally, when you press Finish, HAP uses these high-level inputs to generate detailed definitions for the air systems, plants, chillers, cooling towers and boilers, as necessary. For example, if the screens above are being applied to the four story building created in the Building Wizard, HAP will automatically generate four chilled water VAV air systems with hot water heat, one chilled water plant with two chillers and two cooling towers, and a hot water plant with a natural gas boiler, and then link all the components together. Data is ready for use in energy simulations, or can be adjusted before running calculations.
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Equipment Wizard can be used to configure scenarios involving:
• Rooftop units
• Split DX AHUs
• Chilled Water AHUs
• Self-Contained Units
• Hydronic Fan Coils
• DX Fan Coils (PTACs, PTHPs)
• Water Source Heat Pumps
• Ground Source Heat Pumps
Further a variety of CAV, VAV and VVT air system types are offered. Heating types include electric resistance, heat pump, fossil fuel, hot water and steam.
When using the Full Wizard Session to create multiple HVAC scenarios, features for copying and modifying scenarios are offered so you can quickly create variations of the same base scenario. | |
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