Overview
About the Direct-Fired Vapour Absorption Chiller
Direct-Fired Absorption Chiller
A direct-fired absorption chiller is a thermal cooling system that burns natural gas or light fuel oil in an integrated burner to drive the lithium bromide-water absorption cycle. Unlike waste-heat or steam-driven models, it operates independently of any external heat source - making it ideal for facilities without boilers or excess process heat, while still eliminating the need for electricity-hungry mechanical compressors.
The BROAD Direct-Fired Vapour Absorption Chiller is a premium, thermally-driven HVAC solution engineered for industrial and commercial environments seeking reliable, energy-efficient, and non-electric cooling and heating. This advanced system leverages natural gas or light fuel oil to deliver high-capacity cooling and hot water with minimal electricity demand and ultra-low emissions - making it ideal for large facilities, data centres, manufacturing plants, hospitals, and sites with unstable power supply.
With a cooling capacity range of 233 kW to 11,630 kW (66–3,300 RT) and hot water output up to 65°C, the direct-fired chiller utilises state-of-the-art lithium bromide-water absorption technology. Its dual-fuel burner achieves NOx emissions below 10 ppm - among the lowest in the industry - ensuring compliance with India's strictest environmental regulations while delivering substantial electricity savings.
Key specifications
Performance at a glance
- Cooling capacity
- 66–3,300 TR
- Hot water output
- Up to 65°C
- Fuel type
- Natural Gas / Light Oil
- Emissions
- < 10 ppm NOx
How it works
The absorption cycle, step by step
- 1
Heat input
Steam, hot water, exhaust gas or a gas/oil burner heats the generator. No compressor is needed.
- 2
Generator
The heat boils water vapour (the refrigerant) out of the lithium bromide solution.
- 3
Condenser & evaporator
The vapour condenses, then evaporates under deep vacuum, pulling heat out of the chilled-water circuit.
- 4
Absorber
Concentrated lithium bromide re-absorbs the vapour and the solution returns to the generator.
- 5
Chilled water out
Chilled water leaves for process cooling or air conditioning, with water as a zero-ODP, zero-GWP refrigerant.
Model finder
Model Specifications
| Model | Cooling Capacity | Dimensions (L×W×H) | Energy Input |
|---|---|---|---|
| Direct-Fired Series | 66 - 3,300 TR | Varies by Capacity | Natural Gas / Light Oil |
Engineering
Key Features
Dual-Fuel Burner
Operates on natural gas or light fuel oil with seamless switching - ultra-low NOx emissions below 10 ppm.
Corrosion-Resistant Heat Exchangers
Built for decades of reliable operation with advanced materials that resist the corrosive effects of lithium bromide.
Automated Vacuum Purging
Automatic non-condensable gas purging and vacuum maintenance for stable, long-term performance without manual intervention.
Intelligent Control Logic
Automated capacity modulation and crystallisation prevention ensure optimal efficiency across fluctuating load profiles.
Modular Multi-Function Design
Adaptable for space cooling, process cooling, hot water supply, and supplementary heating from a single unit.
Business case
Core Benefits
Energy Efficient
Operates at optimal efficiency even under partial loads, saving costs and power versus electric compressor-based chillers.
Low Carbon Footprint
Ultra-low NOx emissions and zero-ODP refrigerant support sustainability targets and environmental compliance.
Reliable Performance
Proven deployments across Asia, Europe, and India with 25+ year operational lifespans and minimal mechanical wear.
Reduced Operational Costs
Flexible fuel choices, low energy demand, and advanced capacity modulation deliver rapid return on investment.
Where it’s used
Applications
- Hospitals
- Hotels
- Shopping Malls
- Data Centres
- Manufacturing Plants
- District Energy Systems
- Large Industrial Plants
Case studies
Recent BROAD installations
Selected projects from across India.
TextileSurat, Gujarat· 2019–20
Kejriwal Geotech Pvt Ltd
1,200 TR · 7-month payback
1,200 TR of process cooling from waste CP steam
Read case study
SteelBellary, Karnataka
JSW Bellary Steel Complex
500 TR Cooling Capacity
500 TR cooling capacity via waste heat recovery
Read case study
Oil & GasVadodara, Gujarat
Indian Oil Corporation
Waste Heat Recovery
Refinery waste heat converted into chilled water
Read case studyFrequently Asked Questions
What fuel types can a BROAD direct-fired absorption chiller use?
What cooling capacity range is available?
Can a direct-fired chiller provide both cooling and heating?
Request a Quote
Get custom pricing and engineering specifications for the Direct-Fired Vapour Absorption Chiller.
