New ApacheHVAC Features in VE 2012

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An overview of the new ApacheHVAC capabilities in VE 2012.

An overview of the new ApacheHVAC capabilities in VE 2012.

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  • 1. ApacheHVAC in VE 2012 Cooling tower loop Condenser water loop Electric water cooled chiller Chilled water loop Tlct Tlet Open cooling Towb tower Vc Ve L T1 Compressor Cooling tower loop pump Secondary pump Tldb Cooling Condenser gl Evaporator Water-to-water G tower heat exchanger Secondary pump Expansion Boiler(s) T2 device Cooling coil or Tewt Tewt Tewt Tewt Towb Tect chilled ceiling Common pipe Combined heat and power Water-to-air Water-to-air Heating coil Heating coil Heating coil Cooling coil Water-to-air Water-to-air Cooling coil Cooling coil heat pump heat pump heat pump heat pump Condenser Air-to-water Key: heat pump water pump water Primary pump Tedb ge Heat recovery Tewb Tedb air Primary pump Solar water Water source heater heat exchanger To water source Key: water air (lake, well, etc.) Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 2. ApacheHVAC: Flexible modeling of standard and advanced systems• Numerous customizable pre-defined systems and equipment options in HVAC library• Components based modeling affords exceptional flexibility and controls modeling • Pre-define conventional and advanced systems can be modified to match design • Supports interaction with thermal models for nat-vent, DSF, labyrinths, UFAD, etc.• Multiple systems, models, and VE modules can interact within a single thermal zone.• Increasingly user-friendly system setup, sizing, and customization• System loads/sizing reports and detailed results analysis optionsWith the addition of a few controls (or using the 07c Mixed-mode VAVsystem from the HVAC library), a standard VAV system with chilled andhot-water loops can become a mixed-mode system integrated andinteracting with natural ventilation at every simulation time step. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 3. Systems and components offer many options – simple to detailed• HVAC library offers import & export of pre-defined and custom systems, equipment, and controls• Predefined conventional multi-zone VAV systems, for example, include… • Single- and “dual-max” VAV controls; airflow- or SAT-first cooling control strategies • Coil water flow control for LAT-first re-heat control strategy • Night-cycle operation with minimum fan flow rate and OA min or off • OA economizer: DBT, WBT, or DPT limits, diff enthalpy, mixed temp reset • Demand-controlled ventilation (zone CO2-based DCV); separate EA & transfer paths • Chilled-water, DX, or evaporative (IDE or IDDE) cooling; simple or advanced coil models;• Predefined non-standard systems include… • Mixed-mode (mech/nat-vent), UFAD, active chilled beams, DOAS, DCV, radiant panels, etc.• Expanded waterside capabilities cover a broad range of equipment configurations for heating, cooling, pre-heating, pre-cooling, waterside economizes, heat recovery, heat transfer, and more. Cooling tower loop Open cooling Towb tower Cooling tower loop pump Water-to-water heat exchanger Secondary pump Boiler(s) Tewt Tewt Tewt Tewt Common pipe Combined heat and power Water-to-air Water-to-air Heating coil Heating coil Heating coil Cooling coil Water-to-air Water-to-air Cooling coil Cooling coil heat pump heat pump heat pump heat pump Air-to-water heat pump Heat recovery Tewb Tedb Primary pump Solar water Water source heater heat exchanger To water source Key: water air (lake, well, etc.) Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 4. ApacheHVAC in VE 2012• New interface, HVAC systems library, editing tools, and waterside features. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 5. HVAC Systems Library• New prototype systems, enhanced selection tree, and mouse-driven placement. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 6. HVAC Systems Library• Expanded import options for HVAC equipment, profiles, and fuels/energy end-use. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 7. HVAC Systems Library• Export complete systems or any subset to a user library.• Export options for selection, HVAC equipment, profiles, and fuels/energy end-uses Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 8. System and Multiplex editing• System and multiplex “containers” aid selecting, naming, moving, copying, and export.• New options for adding multiplex layers when assigning from room/zone group. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 9. User interface and controller editing• Updated and better organized toolbars• New system network drawing interface: • Drag & drop Move and Copy • Select-drag MOVE • Select-Ctrl-drag COPY • Stretchable controller and sensor leads • Start-cusp-end drawing of network paths with minimal mouse clicks using “pencil” • New mouse-keyboard shortcuts Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 10. System setup, main input parameters, autosizing, and reports• System setup & sizing toolbar in ApacheHVAC • System schedules • Parameters • Zone-level sizing • 62.1 ventilation • System-level sizing • Sizing reports Focus on current HVAC file eliminates need for “proposed.asp” target file.* *This file naming convention is still auto- generated and required when using the ASHRAE 90.1 PRM Navigator. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 11. Heat transfer loop• Extensive control over loop parameters and sizing. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 12. Heat transfer loop• Numerous options for heat acquisition/pre-heat and heating equipment sequencing. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 13. Heat transfer loop Cooling tower loop Open cooling Towb tower Cooling tower loop pump Water-to-water heat exchanger Secondary pump Boiler(s) Tewt Tewt Tewt Tewt Common pipe Combined heat and power Water-to-air Water-to-air Heating coil Heating coil Heating coil Cooling coil Water-to-air Water-to-air Cooling coil Cooling coil heat pump heat pump heat pump heat pump Air-to-water heat pump Heat recovery Tewb Tedb Primary pump Solar water Water source heater heat exchanger To water source Key: water air (lake, well, etc.) Heat transfer loopThis conceptual diagram of the new heat transfer loop in ApacheHVAC shows it as configured forzone-level water-loop (water-to-air) heat pumps, as well as a range of optional heating and coolingsources. Not all options , such as fluid cooler vs. cooling tower, are shown. Connections to otherloops, such as for condenser heat recovery from a CW loop, are also not shown on this diagram. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 14. Heat transfer loop• Water-source heat exchanger for heat acquisition and/or rejection.• Cooling tower and wet/dry fluid cooler options for heat rejection. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 15. Water-to-air heat pumps• Water-to-air heat pumps (WAHPs) with heating and cooling modes • Zone-level devices that attach to a common heat transfer loop Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 16. Water-to-air heat pump coils• New dedicated variants of the “simple coil” model for use with WAHPs Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 17. Waterside modeling• Chilled water pre-cooling loop • cooling tower • fluid cooler • water-source heat exchanger• Enhanced heat transfer from condenser-water loop to hot water and heat transfer loops• Selection of recipient moved to recipient loop (remains displayed on provider loop) Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 18. Enhanced Heat Recovery• Choice of percentage availability and explicit heat transfer models for both hot-water loop and heat-transfer loops• Multiple heat recovery sources (i.e., more than one CW loop) now permitted with percentage availability model• Optional WWHP can be used to upgrade heat from each source can to higher HTL or HWL temp • Fixed COP (steady-state performance) when used with the simpler percentage availability CHR model Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 19. Enhanced Heat Recovery• Explicit model for inter-loop heat exchanger • Design effectiveness at loop design temperatures • Effectiveness varies with delta-T between loops • For use with single source and recipient loops• Simple WWHP for optional upgrade of recovered heat from CW temperature to higher HTL or HWL temperatures. • COP settings for two specified thermal lift (delta-T) data points • Linear interpolation of COP between data points Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 20. Waterside modeling• Radiators and chilled ceilings now see temperature variation of connected water loop (design temp, reset, or off-design temps when “underserved”), and are compatible with integrated waterside economizer operation.• Defined types have been made “scalable” via number of units input in the radiator and chilled ceiling dialogs.• Autosizable radiators and chilled ceilings will be included in the next feature pack. This will provide autosized water flow rate and number of units, and will also add several related design parameters to the dialogs for radiators and chilled ceilings. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 21. DX Cooling• Separation of DX Cooling performance characteristics in type dialog from sizing for each instance • Type provides performance curves, rated COP, condenser fan EIR, and rating conditions. • Coil dialog includes capacity, coil contact factor, design conditions, and resulting design COP. Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 22. Usability enhancements• Expanded HVAC network integrity checks with highlighting of opposing flows• Separate oversizing factor for fans and new system-level fan min flow rate parameter• Specification of infiltration rate in terms of l/s or cfm per unit façade area, rather than floor area (in thermal templates and room data Air Exchanges )• Coupling of OR connections to controllers without sensors• Refinements to modeling and controls (behind the scenes) for coils and water loops• New pre-defined HVAC systems using VE 2012 capabilities Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.
  • 23. IES <Virtual Environment>Integrated building performance analysis Cooling Season HVAC System Energy May – September Denver, Colorado (TMY climate data) Radiant+DOAS 1.93 0.64 Estimated savings = 62 to 71% 0.26 0.21 VAV+WSFC-precool 3.64 4.19 0.49 VAV with WSFC 4.51 4.13 0.36 VAV Baseline 6.41 3.85 0.36 Chillers (VAV only), cooling towers, and chilled water pumps (MWh) Hydronic system pumps and evaporative cooling spray pump (MWh) Fans (including cooling tower fan for waterside free cooling) (MWh) Boilers, natual gas (MWh) Copyright © 2012 Integrated Environmental Solutions Limited. All rights reserved.