Variable Speed Drive (VSD) pump for cooling towers

Variable Speed Drive (VSD) Pump for Cooling Towers | Intelligent Heat Rejection by EKG (Malaysia) Sdn Bhd

Transform Fixed Energy Waste into Dynamic, Demand-Based Efficiency
A Variable Speed Drive (VSD) pump is the single most impactful upgrade for a cooling tower system, replacing the inefficient "always-on, full-blast" operation of constant-speed pumps with intelligent, demand-matched flow. By dynamically adjusting pump speed to the exact heat rejection needs, this technology slashes energy consumption, reduces water use, and extends equipment life. EKG (Malaysia) Sdn Bhd provides turnkey VSD pump solutions for cooling towers, delivering guaranteed performance and rapid return on investment.

The Problem: Why Constant-Speed Tower Pumps Waste Resources

• Oversized for Most Conditions: Pumps are sized for peak summer load but operate year-round at that capacity.

• Throttling Valve Losses: Valves are used to restrict flow, converting pump energy into wasteful heat and pipe stress.

• Inefficient at Part Load: The pump-motor combination operates far from its optimal efficiency point during low-load periods.

• Poor Temperature Control: Inability to finely control condenser water supply temperature impacts chiller efficiency.

Our VSD Pump Solution: How It Works

A VSD (or VFD) controls the frequency of the electrical power supplied to the pump motor, allowing its speed to be varied. This is governed by the Affinity Laws, where:

• Flow is proportional to speed.

• Pressure (Head) is proportional to the square of speed.

• Power consumed is proportional to the cube of speed.

A 20% reduction in speed yields nearly a 50% reduction in energy consumption.

Our Integrated VSD Pump System for Cooling Towers

1. System Audit & Baseline Measurement:

   • We log existing pump power, flow rates, and tower approach temperatures to establish a pre-retrofit performance baseline.

2. Right-Sized VSD & Control Strategy:

   • We select and install a correctly sized VSD, often retaining the existing pump if it is in good condition.

   • We implement an advanced control strategy, typically Condenser Water Temperature Reset. The VSD modulates pump speed to maintain the optimal leaving water temperature from the tower based on:

     • Chiller load

     • Ambient wet-bulb temperature

     • Tower approach

3. Professional Installation & Integration:

   • Our certified electricians handle all power and control wiring.

   • We integrate the VSD with your existing Building Management System (BMS) or cooling tower controls.

4. Commissioning & Performance Verification:

   • We program the VSD, tune the control loop, and verify safe operation across the full speed range.

   • We measure and document post-installation energy savings.

Quantifiable Benefits of a VSD Tower Pump

• Energy Savings: 30% to 60% reduction in pump energy consumption is typical, with the fastest ROI of any cooling plant upgrade.

• Water Savings: Reduced flow lowers evaporation drift and blowdown, conserving water and chemical treatment.

• Extended Equipment Life: Softer starts, reduced operating hours, and elimination of water hammer drastically extend the life of pumps, motors, seals, and tower fill.

• Improved Chiller Efficiency: Optimal, stable condenser water temperature improves chiller Coefficient of Performance (COP).

• Reduced Maintenance: Elimination of throttling valves and reduced bearing wear lower long-term maintenance costs.

Is Your Cooling Tower a Candidate?

Signs your system needs a VSD pump upgrade:

• Pumps run constantly, regardless of outdoor temperature or building load.

• You use manual or automatic valves to throttle flow.

• Your energy bills are high, and the cooling tower pump is a major contributor.

• You are pursuing green building certification (GBI, LEED).

The EKG Advantage

• Cooling System Specialists: We optimize the entire heat rejection loop, not just install a drive.

• Guaranteed Savings: Our proposals are based on engineering calculations, not estimates.

• Turnkey Project Management: We handle everything from audit and design to installation, commissioning, and post-installation support.

• Local KL & Malaysia Support: Rapid technical service and parts availability.

Stop Pumping Money Away. Start Saving Intelligently.
A VSD pump retrofit is a high-impact, low-risk investment with a clear financial return.

Contact EKG (Malaysia) Sdn Bhd today for a free cooling tower pump energy audit and a detailed savings proposal specific to your facility.