HVAC Design • VRV/VRF • Chillers • IAQ
Comfort cooling से लेकर mission-critical environments तक — हम load calculations, equipment selection, ducting, controls, commissioning और TAB (Testing, Adjusting, Balancing) end-to-end deliver करते हैं।
Overview
हम HVAC को lifecycle दृष्टि से design करते हैं — heat load (ASHRAE tables), equipment COP/EER, diversity factor, fresh air code compliance, acoustics, controls integration और maintainability पर फोकस रहता है।
ASHRAE / ISHRAE NBC/ECBC Ready Low Noise Design BMS IntegrationDesign Highlights
- Room-wise heat load, infiltration, ventilation (CFM) और sensible/latent balance.
- Equipment selection by COP/ IPLV, part-load strategy और redundancy (N+1).
- Hydronic/ refrigerant piping sizing, pump head calc, expansion & safety.
- Acoustic treatment, vibration isolation, condensate management.
Ventilation & IAQ
Fresh air (O.A.) with heat recovery (HRV/ERV), filtration (MERV 8–13/HEPA), pressurization & exhaust balance for healthy interiors.
HRV/ERV HEPA/MERV CO₂ Control PressurizationKey Points
- Demand-controlled ventilation via CO₂/TVOC sensors.
- Toilet/Kitchen/Car-park exhaust with make-up air & VFD control.
- Positive/negative pressure rooms as per application (labs, OT, kitchens).
VRV/VRF Systems
Inverter-driven multi-split with long piping runs, simultaneous heat/cool (heat recovery) options, zoning flexibility और excellent part-load efficiency.
Inverter Scroll Heat Recovery Long Piping ZoningDesign & Safety
- Refrigerant piping sizing, oil traps, elevation checks, leak detection (R-410A/ R-32).
- Refnet/header layout, sub-cooling, condensate strategy.
- Third-party controls / centralized BMS integration (BACnet/Modbus).
Chillers & AHU Plants
Air/Water-cooled chillers, primary-secondary pumping, VFDs, AHU/FAHU with coil selection — large buildings/industrial के लिए best choice.
Air/Water Cooled Primary-Secondary VFD Pumps FAHU/AHUHydronics & Plant Room
- P&ID, pipe sizing, pump head calc, expansion tank & PRV selection.
- Cooling towers (for water-cooled), approach & cycles-of-concentration.
- Plate heat exchanger, bypass & differential pressure control.
Ducting & Controls (BMS)
SMACNA-based duct design, leakage class, balancing dampers; BMS/IoT driven temperature, humidity & airflow control.
SMACNA VAV/CAV Fire/Smoke Dampers BMS/IoTKey Elements
- VAV boxes, reheat coils, anti-sweat insulation, acoustic lining.
- Motorized fire/smoke dampers with interlocks.
- DDC controllers, BACnet/IP integration, trend logs & alarms.
Commissioning & TAB
Method statements, ITP, pre-functional/functional tests, air/water balancing और O&M training के साथ project handover.
ITP/Checklists Water/Air Balance Acoustic Tests O&M PacksDeliverables
- As-built drawings (GA, Ducting, Piping), control architecture & IO list.
- Balancing reports, instrument calibration, test certificates.
- Training, O&M manuals, spares lists & warranty documentation.
Energy Audit & Retrofit
Existing systems में energy saving — VFDs, heat recovery, EC fans, high-efficiency coils, control optimization & IAQ upgrades.
VFD Retrofits Heat Recovery EC Fans IAQ UpgradeTypical Savings
- Part-load optimization (VRF/Chiller sequencing).
- Demand-controlled ventilation (CO₂-based), economizer cycles.
- Water-side optimization: ΔT reset, pump VFDs, tower fan VFDs.
System Comparison
| Parameter | DX / Split | VRV/VRF | Chiller + AHU |
|---|---|---|---|
| Capex | Low | Medium | High |
| Opex / Efficiency | Medium | High (part-load) | High (with VFD/IPLV) |
| Scalability | Low | High (zoning) | Very High (large sites) |
| Controls | Basic | Advanced | Advanced/BMS |
| Best For | Small offices/retail | Multi-storey, hotels | Malls, campuses, plants |
| Redundancy | Unit level | Module level | N+1 plant level |
| IAQ Upgrades | Limited | Good | Excellent (AHU/FAHU) |
Final selection load profile, zoning, capex/opex, maintainability और future expansion पर depend करता है.