HEATING TECHNOLOGY
Considering energy efficiency in hybrid heating systems
Barry Fentem delves into the critical aspects of hybrid systems, focusing on their strategic advantages, technical considerations and the role they play in effective energy management.
Barry Fentem
www.altecnic.co.uk
H
Specification divisional manager at Altecnic
Furthermore, any system that has a heat pump as its energy source would benefit from installing an automatic dynamic balancing valve, like our Dynamical thermostatic radiator valve. By accurately managing the flow rates throughout the heating circuit using a flow settable, pressure independent, thermostatic radiator valve (TRV), each part of the system can receive the correct amount of energy independently, thus increasing the working life of the compressor within the heat pump.
ybrid domestic heating systems offer a compelling solution by combining the best of both: the reliability
and familiarity of gas boilers with the sustainability and efficiency of heat pumps. The gas boiler provides a familiar and dependable source of heat, while the heat pump harnesses renewable energy from the environment, offering a more energy- efficient alternative. Hybrid systems are designed
to leverage the strengths of both technologies. The heat pump excels in moderate temperatures, drawing heat from the air or ground to warm the home. During colder periods, when the heat pump’s efficiency might drop, the system seamlessly switches to the gas boiler, ensuring uninterrupted heating. This dynamic approach ensures both efficiency and reliability, making it an attractive option for diverse climate conditions.
Energy management Hybrid systems are akin to a smart thermostat that adjusts the temperature of a property based on real-time conditions. They optimise energy use by dynamically selecting the most efficient heating source based on external temperatures and energy demands. This leads to significant reductions in energy consumption and costs. Energy managers can use hybrid
systems to achieve targeted efficiency improvements. For example, by integrating advanced control systems, hybrid systems can precisely manage heating cycles and temperatures, resulting in optimised energy performance and reduced operational costs. These controls can be aligned with Building Management Systems (BMS) for integrated and automated energy management. Hybrid systems are also highly adaptable. This adaptability is crucial for handling varying heating demands and environmental conditions
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Strategic approach Implementing a hybrid heating system requires a strategic approach, similar to planning a complex project with multiple stakeholders. Energy managers should consider the following strategies for effective deployment and management:
Hybrid systems are designed to leverage the strengths of both gas boilers and heat pumps
because they can automatically adjust their operation, switching between the heat pump and boiler to maintain optimal performance. Such flexibility is particularly beneficial for energy managers tasked with overseeing diverse heating environments. For instance, in buildings with varying occupancy patterns or insulation levels, hybrid systems can be tailored to meet specific needs, ensuring efficient heating without unnecessary energy expenditure.
Property assessment Before adopting a hybrid system, a thorough assessment of the property’s energy needs is essential. Energy managers should evaluate factors such as insulation quality, building orientation and occupancy patterns to determine the most suitable system configuration. An accurate assessment ensures that the hybrid system is appropriately sized and configured, avoiding over- or under-performance. This helps in maximising the efficiency and cost- effectiveness of the system, aligning with broader energy management strategies. The quality of components is
also critical in ensuring the long- term reliability and efficiency of hybrid systems. For example, using high-quality valves and filters is like choosing premium parts for a high- performance vehicle. For example, components such as the iStop Anti-Freeze Valve and the Caleffi XF magnetic filter, both from Altecnic, are
designed to enhance the system’s performance and longevity. The iStop Anti-Freeze Valve
protects the heat pump by preventing freezing in low temperatures, ensuring reliable operation throughout the year. Similarly, the Caleffi XF magnetic filter removes dirt and air from the system, maintaining optimal performance and preventing blockages that can reduce efficiency. The adjustable by-pass in larger sizes allows installers to control flow rates, which is ideal for heat pump applications.
● Pilot Projects: Start with a pilot project to assess the performance and benefits of hybrid systems in a controlled environment. This can provide valuable insights and help refine the approach before a full-scale rollout.
● Training and Support: Ensure that installation teams and maintenance personnel are trained on the specific requirements and best practices for hybrid systems. This helps in minimising operational issues and maximising the system’s efficiency.
● Performance Monitoring: Continuously monitor the system’s performance using data analytics and feedback from users. Regular evaluations can help identify areas for improvement and ensure that the system remains aligned with energy management goals.
The Caleffi XF magnetic filter prevents blockages that can reduce system efficiency
The iStop anti-freeze
valve ensures reliable heat
pump operation throughout the year
Conclusion Hybrid heating systems offer a strategic solution for energy managers and consultants seeking to enhance efficiency and sustainability in domestic heating. By combining the reliability of traditional boilers with the efficiency of heat pumps, these systems provide a flexible and adaptive approach to meeting diverse heating needs. Careful consideration of factors such as system assessment and component quality is essential for successful implementation. With the right approach, hybrid systems can deliver significant energy savings, improved comfort, and support for broader sustainability objectives. As the transition to more sustainable heating solutions continues, hybrid systems stand out as a powerful tool for effective energy management. ■
EIBI | SEPTEMBER 2024
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