The EnergyLink sub-metering energy management system was installed at Novotel Wollongong Northbeach in November 2015. The hotel operates 24 hours a day with large common area services for guests as well as over 200 individual rooms. The annual electricity spend is in excess of $40,000 per month. With the increased cost of energy, network and demand charges that were mostly beyond their control, it is important for the hotel to reduce its operating cost and monthly electricity invoice through a low capital expenditure, cost effective solution.
- Reduce electricity consumption
- Optimise plant and equipment
- Minimise electricity spend
- Live minute by minute electricity usage and power quality data
- Monitoring and analysis of equipment and devices by EnergyLink engineers
- Operational recommendations and efficiency measures with supporting business cases
- Daily, Weekly and Monthly reporting
- Base loads significantly reduced
- Reduced maximum kVA demand
- Equipment usage trimmed to match operational hours
- Smart threshold alerts which red flag any increases in consumption
The EnergyLink system provides a circuit by circuit view into the operations of the chillers, HVAC, mechanical plant rooms, pool pump rooms, electric heating, kitchen and lighting. This allows EnergyLink to highlight inefficiencies and then work in conjunction with Novotel’s engineers to improve consumption profiles and operating schedules across the site.
In the first month after installation, EnergyLink identified several critical areas of improvement at the hotel. The first initiative that was implemented achieved large off the invoice savings and was the correction and optimisation of electric duct heaters fed from Fuse Link Box – Level 4. Data from this board showed that there was an inverse relationship with external air temperature. This is unusual as the chiller cooling load is required 24 hours a day for the hotel. Upon further investigation and ruling out electric pool heating, it was discovered that there was a bank of electric duct heaters operating 24 hours a day at a load of 15 kW causing a significant heating cooling conflict. The physical correction of this issue on the 14th of December 2015 by Novotel’s engineers is shown in the image below.
The savings achieved on an annual basis are calculated by the reduced operation (kWh), reduced maximum demand (kVA) and reduced load on the cooling system by removing the heating cooling conflict. The annual consumption reduction is approximately 150,000 kWh and maximum demand reduction is 15 kVA resulting in a combined annual savings of $25,400 or a 4.8% reduction in electricity spend from this immediate correction.