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The European Green Deal

The European Green Deal

The European Parliament has approved the European directive on green homes (or EPBD, Energy Performance of Buildings Directive) regarding energy performance in construction, marking a decisive moment for energy efficiency and environmental sustainability of buildings in the European Union. Aiming to align with the commitments of the Paris Agreement and the European Green Deal, this directive aims to reduce building sector emissions by 60% by 2030 to achieve climate neutrality by 2050.
In short, the new Directive stipulates for Italy and all member states that:
All new private buildings must be zero emissions starting from 2030; from 2028 for public buildings.

All residential buildings must reduce their average energy consumption by 16% by 2030 and by 20-22% by 2035.

All non-residential buildings must reduce their average energy consumption by 16% by 2030 and by 26% by 2033.

In Italy, the provisions in the Directive involve between 5.5 and 7.6 million residences. By 2050, residential buildings currently in the less efficient classes F and G will have to undergo a significant energy transformation, with renovation works aimed at improving insulation and energy efficiency.

Key interventions include thermal insulation, replacement of windows, and the adoption of more efficient heating systems that phase out fossil fuels, as required by European regulations. Specifically, this confirms the phasing out of methane gas boilers.

Rpanel’s contribution in the context

Over the centuries, homes have reflected the climatic and architectural needs of different regions of the world. While in the Mediterranean, white and articulated houses developed to reduce the impact of solar rays, in Northern Europe, contiguous and intensely colored houses favored heat capture. However, with technological evolution, attention has shifted towards more efficient and ecological solutions, in line with European green home directives.

The Antagonism between Air Conditioning and Wall Mass:

The advent of air conditioning systems introduced a new scenario: the antagonism between wall masses and air as a conditioning element. While in Northern Europe, homes with significant thermal stability developed thanks to radiant systems, in Italy, dependence on convective systems led to heat dispersion and poor indoor air quality.

BGVM (now TCSsrl) Innovation: The “RPanel” Radiant Panels:

In response to this challenge, BGVM (now TCSsrl) developed “RPanel” radiant panels, an innovative solution for heating and cooling indoor environments. These panels, characterized by low operating temperatures, transform wall surfaces into infrared radiative terminals, offering numerous advantages in terms of energy efficiency, thermal comfort, and environmental sustainability.

Characteristics and Advantages of “RPanel” Radiant Panels:

“RPanel” radiant panels ensure constant thermal comfort and energy savings of over 60% compared to traditional convective systems. Thanks to their innovative technology, they offer superior thermal comfort and contribute to reducing CO2 emissions, promoting sustainable development.

The Role of “RPanel” Radiant Panels in Green Homes:

With the entry into force of European directives on green homes, “RPanel” radiant panels emerge as a key solution for the adaptation of existing buildings. Thanks to their high energy efficiency and reduced environmental impact, they allow compliance with regulatory requirements at low costs.

Conclusions:

“RPanel” radiant panels represent a significant innovation in the building air conditioning sector, offering a concrete response to the challenges posed by European green home regulations. With their contribution to reducing environmental impact and improving indoor comfort, these panels confirm themselves as a fundamental solution for a more sustainable future.

Calculating Energy Savings

To determine the total energy savings when switching from a traditional heating system to a low-temperature radiant system powered by a heat pump with a high COP, and to evaluate the possible leap in energy class of a building, follow these steps:

Factors to Consider

Reduction in heating power: Radiant systems require 18 W/m² compared to 35 W/m² for traditional systems. This equates to a 48.6% reduction in heating power.

Heat pump efficiency: Consider the COP (Coefficient of Performance) of the heat pump. Assume an average COP of 3.5.

Energy class: Evaluate the savings in terms of primary energy and the impact on the energy class.

Energy Savings Calculation

Given a reduction in heating power of 48.6%, the energy saving due to the radiant system is48.6%.

Additional savings due to the heat pump:

A heat pump with a COP of 3.5 implies that for every kWh of electricity consumed, 3.5 kWh of thermal energy are produced.

Comparing with a traditional system:

Primary energy for a traditional system (assuming 90% efficiency for a gas boiler):

Primary energy = 1 kWh / 0.90 = 1.11 kWh (per 1 kWh of heat)

Primary energy for a heat pump (considering 40% efficiency for electricity generation):

Primary energy = 1 kWh / (COP * 0.40) = 1 kWh / (3.5 * 0.40) = 0.714 kWh

Therefore, the energy saving for each kWh of heat produced is:

Energy savings = (1.11 – 0.714) / 1.11 * 100 ≈ 35.7%

Total savings:

The total combined savings can be estimated by adding the partial savings from the radiant system and the heat pump. However, for a more precise estimate, consider that the two savings are not entirely independent:

Total savings = 1 – ((1 – 0.486) * (1 – 0.357)) ≈ 1 – (0.514 * 0.643) ≈ 67%

Leap in Energy Class

The leap in energy class depends on the building’s energy performance index (IPE). In Italy, energy classes are defined by the IPE:

Class E: IPE between 1.50 and 2.00 kWh/m²/year.

Class A: IPE less than 0.50 kWh/m²/year.

Assume a building in Class E with an IPE of 1.75 kWh/m²/year:

IPE after implementing the radiant system and heat pump:

IPE_new = 1.75 kWh/m²/year * (1 – 0.67) ≈ 0.5775 kWh/m²/year

This value approaches Class B (0.50 – 1.00 kWh/m²/year), suggesting a significant jump in energy classification, potentially by at least two classes (from E to B). In some cases, further optimizations and reductions could even lead to achieving Class A.

Conclusion

Switching from a traditional heating system to a low-temperature RPanel radiant system with a heat pump can lead to a total energy saving of around 67%. This improvement can result in a significant leap in energy class, potentially moving a building from Class G to Class C or even A with a heat pump, depending on the specific efficiency of the system and the characteristics of the building.