case study
Brisbane School Case Study: Transition from Gas Heater to Inverter Heat Pump
Introduction
The Brisbane School currently uses an LPG gas heater for pool heating, which is both costly and unreliable due to frequent breakdowns. This case study proposes transitioning to an inverter heat pump, emphasising its efficiency, cost savings, and reliability, with a focus on securing a low-cost electricity rate to maximise savings.
Current Situation
- Current System: The school uses an LPG gas heater for continuous pool heating. This system is not only costly but also unreliable due to frequent breakdowns.
- 14-Day LPG Usage: From June 5 to June 19, the LPG consumption was 962 litres, costing $1,194.60 (excluding supply charges).
Conversion to kWh:
- Energy Content of LPG: 1 litre of LPG provides approximately 6.9 kWh.
- Total Energy Consumption:
962 Litres × 6.9 kWh/litre = 6,637.8 kWh equivalent
Proposed Solution: 2 x Full Inverter Heat Pumps
- High Efficiency solution: The heat pump offers a approx. average COP of 5 during cooler months (e.g., June), significantly increasing energy efficiency compared to the existing gas system which has a COP of below 1.
Cost Efficiency Analysis
Current Gas Heating vs. Inverter Heat Pump with current Providers
- Estimated Energy Consumption: For the 14-day period, the heat pump, due to its COP of 5, would require approximately.
6,637.8 kWh ÷ 5 = 1,327.56 kWh
Cost with Origin (30 cents/kWh):
- Cost = 1,327.56 kWh × 0.30 = $398.27
Summary of Cost Savings
- With Origin (30 cents/kWh): The Inverter Heat Pump reduces the 14-day heating cost to $398.27 resulting in a savings of $796.33 over the current gas system, representing a 67% reduction in operational costs.
Conclusion
Switching to the inverter heat pump offers substantial cost savings potential for the Brisbane School.
This technology enhances heating efficiency and ensures reliable, consistent pool heating while minimising breakdowns and maintenance needs. Additionally, securing a low-cost electricity rate will further maximise savings, support sustainability efforts, and reduce the environmental footprint.
Recommendations
- Secure Low-Cost Electricity: Engage with electricity providers to secure the most favourable rate to maximise savings.
- Proceed with Electrification: Implement the change to an Inverter Heat Pump system to achieve significant cost savings and ensure reliable, continuous heating for the pool.
