A hybrid heating-cooling system is defined as a system that combines individual sub-systems of thermal energy production to make the most of the benefits of any technology.
Hybrid systems usually combine the most efficient green technologies, conventional heat sources, Renewable Energy Sources (RES) and New Technologies in the control and automation of heating-cooling systems.
Modern hybrid system installations usually consist of an RES (Heat Pump or Solar Thermal System), which is combined with gas or oil boilers with condensing technology. For the creation of installations with very high efficiency levels, 2 RESs are often combined, such as Heat Pumps with Solar Thermal.
Why choose a hybrid heating-cooling system?
The choice of a hybrid heating system compared to a conventional system offers firstly very high efficiency levels combined with maximum energy savings. This is because, thanks to the modern automation systems of hybrid systems, the use of the most efficient system for the specific conditions is automatically selected.
For example, the thermal performance of heat pumps varies with weather conditions, since the heat pump efficiency is greatly reduced at a very low ambient temperature, and in combination with low humidity can result in low levels of efficiency. At that time, the hybrid system will give priority to operation in the second subsystem e.g. the oil, liquefied petroleum gas or natural gas boiler and end up offering an extremely high level of heating with absolute efficiency and savings.
In addition, the existence of two or more thermal energy production systems guarantees uninterrupted operation of the system and the supply of heat, even if a subsystem is damaged.
Advantages of Hybrid Energy Saving Systems
- High efficiency in heating and cooling
- They combine the advantages of individual systems-technologies
- Increased reliability and seamless operation
Heating / Cooling Technologies Used in Hybrid Systems
Solar Thermal Systems
A modernsolar thermal system is one of the most interesting alternatives to the production of hot water for space heating and domestic hot water, as it can cover most of the building's thermal energy needs. The basic principle of these systems is that solar energy stored in special containers when available, during sunshine and used appropriately to meet heating and hot water needs, and when it is not sufficient for complete cover loads (during the night or a cold and cloudy day) then engages the second energy source (heat pump or boiler) to cover the remaining energy.
Heat pumps are machines that provide the ability to pump heat from the environment and transport it to the water used to heat the building. In this way, by consuming a small amount of electricity, multiple heat energy is generated to heat the spaces and domestic hot water. The use of the Heat Pump is significantly superior to conventional systems, as it achieves energy savings and reduced operating costs up to 70% (savings of 60-70% compared to oil and 50-60% in relation to natural gas) and contributes to the substantial energy upgrading of the building.
Gas Fuel or Oil Boilers with Condensation Technology
The condensing boiler are highly efficient boilers that utilize the energy stored in the steam of the exhaust fumes.The technology is not new, but according to the new European Ecodesign Directive, the minimum energy performance requirements and emissions pollutants to be met by oil and gas boilers are such that conventional boilers can not cover them.
Conventional Gas Fuel or Oil Boilers
In many existing installations upgrading to a hybrid system is usually done by keeping conventional oil or gas fuel boilers. Although the performance levels of these conventional systems are not particularly high, with the right tuning and the right automation, they can make the most to the hybrid system.
Selection, installation and setting up a Hybrid System
For the proper selection of a hybrid system, we need High Expertise and an appropriate Techno-Economic Analysis by an Experienced Engineering Team. Also, a very important role is played by the proper installation and adjustment as well as the maintenance of the system by Specialized Technical & Engineering Installers.
All of the above are necessary in a Hybrid System in order to achieve:
# Quality Thermal Comfort # Increased Energy Saving # High Reliability # Seamless Operation.