The Dunham Bush WCHX Series (Hyperion / EU) is an ultra-compact, high-efficiency water-cooled horizontal rotary screw liquid chiller. Engineered with a cooling capacity scaling from 85 RT to 550 RT ($300\text{ to }1930\text{ kW}$), it utilizes environmentally sound green refrigerants (such as R134a, R513A, or R1234ze) to meet modern environmental standards. Featuring a space-saving flooded shell-and-tube configuration and an advanced Plate Heat Exchanger (PHE) economizer loop, the WCHX series is the ideal space-saving central cooling plant for commercial high-rises, textile mills, and mega-infrastructure across Bangladesh.
The Dunham Bush WCHX Series introduces a massive evolution in positive-displacement rotary screw chiller technology. Backed by over 45 years of Dunham Bush mastery in rotary screw engineering, this series features rugged, semi-hermetic horizontal twin-screw compressors designed for multi-decade life cycle operations.
Unlike bulkier conventional models, the WCHX footprint is optimized for structural tight spots. Its innovative space-saving construction allows smaller capacity models to comfortably navigate single access doors or cramped underground mechanical plant rooms in urban commercial sectors. By combining computer-matched horizontal screws with a flooded-type heat exchange system, the WCHX maintains extreme thermodynamic stability even under high condensing pressures—an operational vulnerability where standard centrifugal variants often face severe surge or trip failures.
| Feature/Attribute | Technical Specification Details |
| Cooling Capacity Range | 85 to 550 RT ($300\text{ to }1930\text{ kW}$) |
| Compressor Layout | Single or Twin high-efficiency Semi-Hermetic Horizontal Screws |
| Redundancy Infrastructure | Independent refrigerant circuits per compressor |
| Capacity Control Devices | Electronic Expansion Valve (EEV) paired with a PHE Economizer |
| Automation Controller | Advanced Vision 2020i / DB Director Programmable Microcomputer |
| Compliance & Standard | AHRI Certified (Standard 550/590) & ASHRAE 90.1 Compliant |
High-Lift Horizontal Displacement Control: Smoothly handles wide operational bounds, allowing continuous, stable cooling capacity even during grueling hot and humid weather.
PHE Economizer Capacity Boosting: Integrates a Plate Heat Exchanger (PHE) economizer circuit with an Electronic Expansion Valve (EEV). This precisely sub-cools liquid refrigerant before it enters the evaporator, significantly multiplying total cooling capacity and lowering sub-seasonal power expenses.
Flooded Fluid Level Regulation: Dynamically tracks the optimal liquid level in the flooded shell-and-tube evaporator, ensuring premium heat exchange rates are achieved across all operational loads.
BMS Network Communication: Features built-in Ethernet and RS485 communication protocols (supporting Modbus, BACnet IP, or LonWorks via adapters), feeding instant chiller plant data straight to the central control building.
Public structures—such as automated state server banks, multi-ministry secretariats, and research hospitals—require high reliability and mechanical redundancy. The multi-compressor layouts of the WCHX line offer independent refrigeration loops; if one loop requires routine inspection, the secondary loop stays on line, providing steady climate control for essential national infrastructure.
For continuous process lines like garment dyeing hubs, textile spinning rings, and high-purity pharmaceutical manufacturing plants, maintaining consistent humidity and temperature is essential. The WCHX series handles continuous, heavy cooling requirements efficiently. Furthermore, its removable water heads allow maintenance teams to mechanically brush away scaling from local hard water sources without disturbing critical chilled-water line connections.
Procuring, rigging, and executing a central HVAC investment requires an experienced local technical partner. Bhai Bhai Engineering is a premier automation and HVAC sourcing choice in Bangladesh, offering:
Verified Authentic OEM Shipments: We coordinate directly with factory manufacturing networks, securing 100% genuine, brand-new Dunham Bush machinery with official tracking documents.
End-to-End On-Site Engineering: Our local technical crew assists throughout structural dimensioning, pipeline checkouts, flow balancing, parameter fine-tuning, and live testing.
Transparent BDT Commercial Quotes: Avoid hidden import fees. We offer clean, upfront pricing structures tailored for enterprise budgeting and formal public tenders.
Long-Term Preventive Protection (AMC): Keep your plant running at its original efficiency for decades with our preventative inspection plans, checking internal pressure limits, oil dynamics, and sensor health periodically.
Ready to modernize your industrial plant layout or seeking a competitive price for your building's HVAC blueprint? Contact our technical sales desk in Dhaka today to receive a comprehensive commercial proposal and data specifications.
Main Office & Showroom: Podirdia, Khilbarirtek, Vatera, Dhaka-1212. (Nur-E-Madina Mosjid Complex)
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Corporate Email: bhaibhaiengineering51@gmail.com
Online Platform: https://www.bhaibhaiengineering.com/
Q1: What are the main benefits of the horizontal screw design in the WCHX series?
Ans: The horizontal rotary twin screws minimize internal moving parts. This design delivers very stable mechanical torque, lower vibration signatures, and excellent durability under high condenser pressures, keeping the system highly stable during peak Bangladeshi summer ambient heat waves.
Q2: How does the compact blueprint design aid old building upgrades?
Ans: The WCHX shell configuration features a narrow, space-saving design. It is compact enough to pass through standard commercial access doors, saving developers from tearing down concrete structural panels to load or replace a chiller plant module.
Q3: Can the WCHX series adjust its capacity automatically?
Ans: Yes! The variable displacement positive-displacement screw compressor features flexible step or stepless slide valve capacities. This configuration tracks real-time thermal building variations to reduce energy draw during rainy seasons or overnight shifts.
Q4: Is the WCHX series fully certified for international building audits?
Ans: Absolutely. The entire Dunham Bush WCHX catalog carries full AHRI Certification under Standard 550/590 and matches or exceeds international ASHRAE 90.1 criteria. This provides complete compliance for eco-friendly, green factory initiatives in international markets.
At Bhai Bhai Engineering, we take pride in our industry-recognized certifications and achievements. Our dedication to excellence in MEP (Mechanical, Electrical, and Plumbing) solutions is backed by various certifications in central air conditioning systems, fire protection, ventilation, electrical installations, and more. These certifications ensure we meet international standards and deliver top-notch service for your business.
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