Energy Costs as a Growing Operational Pressure
Rising electricity costs have moved energy efficiency from a background consideration to a genuine operational priority for many Australian beverage manufacturers. Refrigeration systems, compressed air, pumps, and heating processes such as hot water rinse and clean in place cycles are among the largest energy consumers on a typical beverage production site, and in many cases, the equipment and control systems managing these processes were designed years ago, when energy costs and efficiency expectations were significantly different. Retrofitting existing equipment for improved energy efficiency, rather than waiting for a full equipment replacement cycle, is an increasingly practical option worth genuine consideration.
Refrigeration: The Largest Opportunity on Most Sites
Refrigeration systems, whether supporting beer tank temperature control, cold storage, or process cooling, are typically among the most energy intensive equipment on a beverage manufacturing site, and also among the areas offering the greatest potential for efficiency improvement through control system upgrades rather than full mechanical replacement. Older refrigeration control systems often run on relatively basic thermostatic or fixed setpoint logic, cycling compressors on and off in response to simple temperature thresholds without accounting for factors such as ambient conditions, actual production demand, or the efficiency losses associated with frequent compressor cycling.
Upgrading refrigeration control to a modern PLC based system, of the kind BevTech has implemented using Siemens platforms and ABB variable speed drives for glycol refrigeration applications, allows significantly more sophisticated control logic: modulating compressor and pump speed to match actual cooling demand rather than simple on off cycling, and optimising setpoints based on real time conditions rather than fixed, conservative values set at original commissioning. This kind of control upgrade can often be delivered without replacing the underlying mechanical refrigeration equipment, making it a comparatively cost effective efficiency improvement relative to full system replacement.
Compressed Air: The Hidden Cost Centre
Compressed air is frequently described as the most expensive utility on a manufacturing site relative to its actual delivered energy, because of the significant conversion losses inherent in generating and distributing compressed air compared to using electricity or other energy sources more directly. Leaks in ageing compressed air distribution systems are extremely common and often go unaddressed for years, since individual leaks rarely cause an operational problem, they simply waste energy continuously in the background.
A structured compressed air audit, identifying and repairing leaks, reviewing system pressure settings for unnecessary margin above actual equipment requirements, and assessing whether compressor control strategy matches actual demand patterns across a production shift, frequently identifies meaningful energy savings with relatively modest investment, particularly on sites where the compressed air system has not been reviewed since original installation.
Hot Water and CIP Systems: Precision Over Conservative Margins
Hot water rinse and clean in place systems, essential to hygiene compliance in beverage manufacturing, are also significant energy consumers, given the water heating and pumping involved. Older systems are frequently controlled with generous safety margins built into temperature, flow, and cycle time settings, reflecting a conservative approach at original commissioning rather than precise, validated requirements. Reviewing and, where appropriate, tightening these parameters, supported by more precise temperature and flow sensing and control logic, can reduce energy and water consumption without compromising the hygiene outcomes the system exists to deliver.
This is a genuine engineering balance rather than a simple efficiency exercise, since hygiene compliance cannot be compromised for the sake of energy savings, but many existing systems carry more conservative margin than is genuinely required once actual process validation data is properly reviewed.
Motor and Drive Efficiency
Older fixed speed motors running conveyors, pumps, and fans throughout a production facility represent another common efficiency opportunity. Retrofitting variable speed drives to motors that were previously running at fixed speed regardless of actual demand allows motor speed, and therefore energy consumption, to be matched to actual process requirements. This is particularly effective on pump and fan applications, where energy consumption relates non linearly to speed, meaning even modest speed reductions during periods of lower demand can deliver meaningful energy savings.
Building a Realistic Retrofit Business Case
The business case for energy efficiency retrofits should be built around genuine, measurable opportunities rather than generic assumptions. This starts with identifying the largest energy consumers on a specific site, refrigeration, compressed air, and heating processes are common candidates but the actual priority varies by facility, and assessing where control system or equipment upgrades offer the clearest path to reduced consumption without unacceptable capital cost or production disruption. Metering and monitoring existing energy consumption, even at a relatively basic level, provides the baseline data needed to validate savings once a retrofit is implemented, and to prioritise which opportunities to pursue first.
Measuring and Verifying Actual Savings
A retrofit project is only genuinely successful if the anticipated energy savings are actually realised and can be demonstrated, rather than assumed based on theoretical calculations alone. Installing basic metering before a retrofit is implemented, whether on a specific refrigeration system, compressed air installation, or a broader section of a facility, provides the baseline needed to measure actual consumption before and after the change. This verification step matters both for validating the specific project’s business case, and for building a manufacturer’s confidence in pursuing further efficiency initiatives based on demonstrated, rather than theoretical, results.
Where energy efficiency projects are pursued partly to support broader sustainability reporting or ISO 14001 environmental management objectives, this measured, verifiable approach to savings also provides genuinely credible data for that reporting, rather than estimates that may not withstand scrutiny from customers or certification auditors.
Considering Government Incentives and Support Programmes
Various state and federal programmes periodically offer incentives, rebates, or co funding for industrial energy efficiency projects, particularly those involving measurable, verified savings of the kind described above. While the specific programmes available change over time, manufacturers planning a significant retrofit project are generally well served by checking current eligibility before finalising project scope, since available incentives can materially improve the business case for equipment or control system upgrades that might otherwise sit on the margin of being cost justified.
An Incremental, Evidence Based Approach
Energy efficiency retrofits do not need to be pursued as a single large capital project. A staged approach, starting with the highest value, most clearly justified opportunities such as refrigeration control upgrades or compressed air leak repair, allows manufacturers to build genuine evidence of savings before committing to broader retrofit programmes across a facility. With combined mechanical, electrical, and automation capability, BevTech supports FMCG manufacturers through this process, from initial energy use assessment through control system and equipment retrofit delivery. To discuss energy efficiency opportunities on your production site, contact BevTech at 25 Silvio St, Richlands QLD 4077, or admin@bevtech.com.au.
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