VFD Controlled HVAC Pumps | Intelligent, Demand-Driven Circulation by EKG (Malaysia) Sdn Bhd
Transform Your Largest Energy Load into an Adaptive, High-Efficiency Asset
VFD (Variable Frequency Drive) controlled HVAC pumps represent the modern standard for intelligent hydronic systems. By replacing fixed-speed operation with precise motor speed control, they eliminate the massive energy waste inherent in constant-flow systems. EKG (Malaysia) Sdn Bhd provides comprehensive VFD pump solutions—from strategic retrofits to new installations—ensuring your chilled water, condenser water, and heating systems deliver exact flow where and when it's needed, slashing operating costs and enhancing control.
Traditional systems force pumps to run at full speed regardless of actual building demand, leading to:
Energy Waste: Pumps consume full power even at 50% load.
Throttling Losses: Energy wasted as heat across control valves.
Poor Temperature Control: Difficulty maintaining stable delta-T.
Excessive Wear: Mechanical stress from constant high-speed operation and water hammer.
A VFD adjusts the electrical frequency to the pump motor, allowing its speed (RPM) to be varied. This leverages the Affinity Laws:
Reduce speed by 20%, and energy use drops by nearly 50%.
The system supplies only the necessary flow and pressure, eliminating waste.
Energy Audit & Feasibility Study:
Data logging of existing pump power and system operation.
Analysis of load profiles to quantify potential savings and ROI.
System Design & Control Strategy:
Right-Sized VFD Selection: Matching drive capacity to motor specifications.
Optimal Control Strategy: Implementing the most efficient setpoint:
Differential Pressure (DP) Control: For maintaining constant pressure in variable flow systems.
Temperature Differential (ΔT) Control: For optimizing chiller and coil performance.
Load-Based Control: Pump speed follows the lead chiller's load or building cooling demand.
Professional Installation & Wiring:
Safe installation of the VFD cabinet, with proper power filtering and bypass options for critical systems.
Integration of necessary sensors (pressure transducers, temperature sensors).
Programming, Tuning & BMS Integration:
Programming the VFD's PID loops for stable, responsive control.
Seamless integration with your Building Management System (BMS) for monitoring, alarming, and advanced sequencing.
Commissioning & Performance Verification:
Testing across the full operating range.
Measuring and documenting post-installation energy savings to validate performance.
Variable Primary Chilled Water Systems: The most efficient configuration, where pump speed directly responds to chiller and building load.
Secondary Loop Pumps in primary-secondary systems.
Condenser Water Pumps: Speed modulated based on cooling tower approach and chiller head pressure.
Heating Hot Water Circulation Pumps.
Energy Savings: Typically 30% to 60% reduction in pump energy consumption.
Reduced Maintenance: Soft starts eliminate inrush current and mechanical shock, extending motor, bearing, and seal life.
Improved Process Control: Precise, stable pressure and temperature control enhances overall HVAC system performance.
Lower Lifecycle Cost: Rapid payback (often 1-3 years) and reduced operating expenses dominate the total cost of ownership.
Sustainability & Compliance: Directly contributes to green building certification (GBI, LEED) goals.
HVAC System Expertise: We understand how pump control affects chillers, coils, and overall system dynamics.
Holistic Approach: We design the control strategy for the entire system, not just a single pump.
Guaranteed Performance: Our solutions are engineered to deliver projected savings.
Local Support & Programming: We provide ongoing optimization and troubleshooting support.
Stop Over-Pumping. Start Smart Pumping.
Upgrade to the intelligence of VFD control and turn your HVAC system into a model of efficiency.
Contact EKG (Malaysia) Sdn Bhd for a free system assessment and a detailed proposal on transforming your HVAC pumps with VFD technology.
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