Heating the Future: A Sustainable Approach with Hybrid Systems.

Author: Pawe? Krzak

As we move to an era of increasing concern about environmental sustainability and rising costs of energy, it is natural that our homes should follow suit. One of the ways developers and existing homeowners can contribute to a greener future while keeping their spaces comfortably warm is by adopting hybrid heating systems. These systems combine multiple heating sources, offer a practical and eco-friendly approach as well and help control the costs of heating.

Understanding the concept of Hybrid Heating Systems

A hybrid system combines two or more heating sources to deliver flexible climate control indoors. In domestic houses in the UK and Ireland, a common hybrid system includes integrating a traditional heating system, such as a gas or oil boiler, with a heat pump. The main goal is to optimise energy usage and reduce heating costs while maintaining indoor comfort, regardless of external temperatures.

Main components of Hybrid Heating System in your house

1.?????? Heat Pump

The main component is the heat pump. It works by transferring heat from one location to another, extracting warmth from the outdoor air or ground, and distributing it inside the building. They are efficient, which makes them ideal for moderate and mild climates. It works on electricity.

2.?????? Traditional Heating System

Mostly gas or oil boilers. These systems provide additional heating power when the heat pump efficiency is getting lower, usually in low external temperatures.

3.?????? Control System

A sophisticated control system that controls the operation of both heating sources, deciding which one to use based on external temperature and other factors, e.g., a current electricity cost. In addition, it needs to ensure that e.g., the oil tank does not run dry. The control system ensures smooth transitions between these sources, so it does not affect the user negatively.

A typical heating scenario for a hybrid heating system in an existing house built before 2000’s in the UK or Ireland, would be the use of a heat pump with external temperatures ranging down to 2-3 degrees Celsius with a transition to an oil boiler when outdoor air temperature falls below these figures. As the traditional heating system is more efficient below freezing, it stays on “stand-by” and is ready to turn on when needed. With the changing climate around the globe (global warming), it is expected the reliance on heat pumps will continue to grow.

Benefits of Hybrid Heating Systems

1.?????? Energy Efficiency: Hybrid heating systems are designed to maximise energy efficiency and keep costs under control. The balance reduces energy consumption and lowers heating costs.

2.?????? Environmental Impact: By reducing the reliance on fossil fuels, hybrid systems help lower greenhouse gas emissions.

3.?????? Cost Savings: Over time, homeowners can experience cost savings due to reduced energy consumption. The heat source is being switched over when necessary to keep the heating costs down.

4.?????? Comfort: These systems maintain consistent demanded indoor comfort throughout the year with minimum input from the user.

5.?????? Versatility: Hybrid heating systems are adaptable to various home heating setups and can be highly customized to suit specific needs and adjustments to local climate.

6.?????? Long-lasting: Due to devices not working constantly (they share the workload throughout the year), their service life increases noticeably.

Key Areas To Be Aware Of When Designing Hybrid Heating Systems:

One crucial factor is load balancing. A well-calibrated system is essential to efficiently distribute the workload between the heat pump and traditional heating sources. This ensures a harmonious operation that maximizes energy usage.

Another critical aspect is the optimal sizing of components to match the specific heating requirements of the property. This approach prevents energy wastage and contributes to the overall optimisation of system performance. Careful consideration of sizing ensures that the hybrid heating system operates at its peak efficiency.

Exploring opportunities for integration with renewable energy sources is also important. This may involve incorporating solar panels and wind turbines to enhance the overall sustainability of the system and reduce the reliance on traditional energy sources.

Implementing weather adaptive controls allows seamless transitions between heating sources based on external conditions. This adaptability ensures that the system operates at maximum efficiency, regardless of the weather, and helps contribute to overall energy savings.

Finally, maintenance plays a crucial role in the longevity and cost-effectiveness of hybrid heating systems. Designing with ease of maintenance in mind ensures that the system remains in optimal condition over time, reducing long-term operational costs.

Hybrid heating systems are a practical and environmentally conscious solution for upgrading heating systems in domestic houses. They offer the opportunity to upgrade energy efficiency, reduce carbon footprint and, in the long term, reduce heating costs. By combining the strengths of a heat pump and a traditional heating system, these hybrid solutions ensure the homeowner enjoys comfortable living spaces, no matter the weather.

About the Author

If you would like to find out more about EDC's Heating Design capabilities that can benefit your next project us today, Pawe? Krzak (Author), Sara Steele (Cork), Conor McGinn (Dublin), Eamonn Drummond (London), Gerard Kirwan (Galway/Limerick) or email us directly at [email protected].