Details

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Total Enthalpy Recovery Wheel Design by EKG (Malaysia) SDN BHD

In the 2026 landscape of the Energy Efficiency and Conservation Act (EECA) 2024, the Total Enthalpy Recovery Wheel (also known as a Thermal Wheel or Rotary Heat Exchanger) is the most powerful mechanical solution for high-volume fresh air treatment. In Malaysia’s tropical climate, where latent heat (humidity) often accounts for over 70% of the cooling load, a well-designed wheel is essential for driving down Building Energy Intensity (BEI).

At EKG (Malaysia) SDN BHD, we engineer total enthalpy wheels that reclaim both sensible and latent energy, allowing your facility to provide 100% fresh air while operating at peak efficiency.

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1. The Engineering Core: Media and Coating

The effectiveness of a recovery wheel is determined by its honeycomb matrix and the desiccant technology applied to its surface.

• Aluminum Matrix: Our wheels utilize a high-tensile, corrosion-resistant aluminum foil matrix. The corrugated design maximizes surface area for heat exchange while maintaining a low air pressure drop.

• Molecular Sieve Desiccant (3Å): To manage Malaysia's humidity, we specify a 3-Angstrom (3Å) molecular sieve coating. This pore size is specifically engineered to catch water molecules (latent heat) while being too small to trap common pollutants or odors.

• Antimicrobial Treatment: Every wheel is treated with a silver-ion antimicrobial coating to prevent the growth of mold and bio-films, ensuring compliance with MOH and VDI 6022 hygiene standards.

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2. Psychrometric Performance Dynamics

The Total Enthalpy Wheel operates by rotating slowly between the supply and exhaust air streams, transferring energy through a continuous cycle of adsorption and desorption.

Energy Type	Exchange Mechanism	Performance Target
Sensible Heat	Aluminum matrix absorbs heat from intake air and releases it into exhaust.	75% - 85% Efficiency
Latent Heat	3Å Desiccant adsorbs water vapor from intake air and flushes it via exhaust.	70% - 80% Efficiency
Total Enthalpy	The sum of temperature and moisture recovery.	72% - 82% Efficiency

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3. Design Features for 2026 Standards

Under the EECA 2024 mandates, the mechanical design must prioritize air stream integrity and electrical efficiency.

• The Purge Sector: To prevent cross-contamination, our designs include a specialized "Purge Sector." This uses a small amount of fresh air to "rinse" the wheel before it enters the supply stream, ensuring that stale exhaust air is not carried over.

• Variable Speed Control: We utilize IE5 EC Direct-Drive Motors for the wheel rotation. By modulating the wheel speed (typically 10–20 RPM), the system can adjust the amount of energy recovery based on the real-time delta between indoor and outdoor conditions.

• L1 Leakage Sealing: High-precision peripheral and radial seals ensure that air bypass is kept to a minimum, preserving the thermal effectiveness of the exchange.

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4. Integration with IE5 Fan Walls

A recovery wheel adds static pressure to the system. To remain compliant with the Specific Fan Power (SFP) limit of 1.1 kW/m³/s, we pair our wheels with high-performance fan technology.

• Low-Velocity Sizing: We size our wheels for low face velocities (typically 2.0 - 2.5 m/s). This reduces the pressure drop across the matrix, allowing the fans to run at lower RPMs and saving significant electrical energy.

• Smart Balancing: The system monitors the pressure drop across the wheel in real-time. If the BMS detects a rise (indicating dust or blockage), it alerts maintenance instantly to ensure the BEI remains within statutory limits.

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5. Why Partner with EKG (Malaysia) SDN BHD?

• Technical Integrity: We provide the Full Psychrometric Analysis and ROI Projections required for professional engineering (P.E.) sign-off and building energy audits.

• 3D BIM Coordination: We model the entire ERV housing and wheel assembly in 3D to ensure perfect airflow paths and zero clashes with structural services.

• BOMBA-Compliant Safety: All materials used in the wheel matrix and casing are fire-rated (Class 0 or B1) for full compliance with Malaysian safety codes.

Is your ventilation system losing 70% of its cooling energy to humidity? Contact EKG (Malaysia) SDN BHD today. We specialize in engineering Total Enthalpy Recovery Wheels that are sterile, silent, and ultra-efficient.