The energy efficiency of buildings is a major concern in the construction and renovation sector. This can have an impact on various aspects of a building, such as thermal insulation. Building professionals are turning to software that enables them to make thermal insulation calculations.
These innovative tools facilitate precise assessment of critical aspects of thermal insulation, including heat loss calculations, determination of thermal bridges and evaluation of thermal resistance. They enable detailed digital simulation of heat flows within structures, contributing to comprehensive and reliable energy audits. Find out all you need to know about thermal insulation calculation software by reading on.
Thermal insulation calculation principles
Calculating the heat loss of a dwelling is a rather complex process that takes several key factors into account:
Wall analysis
Air renewal
Thermal bridges
The basic method is based on the temperature difference between the inside and outside of the dwelling, multiplied by the surface area or volume concerned, and the thermal transmittance of the materials.
According to a study by ADEME, losses through vertical walls account for around 20-25%, and those through the roof can reach 25-30% of total losses in a poorly insulated building. Thermal bridges, where insulation is less effective, also contribute significantly to energy losses. The accuracy of this calculation is crucial to defining heating requirements and implementing effective insulation measures.
The consequences of calculation approximations
The use of thermal calculation software to assess a building's heat losses is crucial to avoid the risks associated with incorrectly dimensioned heating systems. Approximations in the calculation, whether due to underestimation or overestimation of losses, can have significant consequences:
If underestimated, the chosen heating system may prove insufficient, resulting in an inability to maintain a comfortable indoor temperature, especially during cold spells. This can increase energy consumption, as the system has to work harder to compensate for the lack of power.
On the other hand, overestimating heat losses leads to the installation of an oversized heating system. Not only does this represent a higher initial investment, it can also lead to excessive energy consumption and premature system wear.
Specialized thermal insulation calculation software, such as those that calculate thermal resistance or thermal bridges in accordance with NF EN ISO 10211, offer essential precision in calculating losses.
These tools use numerical simulation methods and finite elements to provide accurate estimates, taking into account heat flow through walls, thermal conductivity of materials and thermal phase shift. These software programs are essential for carrying out reliable energy audits and drawing up accurate thermal balances, in compliance with TH Bât rules and other current standards.
Specific features of heat loss in France
In France, heat loss varies significantly according to climatic zone, directly influencing the energy performance of buildings. For example, a dwelling in the north of France, characterized by a colder climate, will have higher heat losses than a similar dwelling in the south. This differentiation is essential for complying with standards such as the French Thermal Regulations (RT 2012), and for efficiently planning heating requirements.
Thermal calculation software, complying with standards such as NF EN ISO 10211, plays a crucial role in the precise assessment of these losses. These tools can be used to carry out numerical simulations and thermal phase shift calculations, taking into account the specific features of each zone. For example, software can calculate a heat loss of 7 kW for a standard house in the north, while the same house in the south might have a heat loss of just 5 kW.
These thermal insulation calculation and heat balance software programs facilitate energy audits, enabling building professionals to optimize insulation according to the specific climatic conditions of each region. For example, in a mountainous area, the software will adjust calculations for lower outside temperatures and stronger winds, thus influencing the building's heat dissipation.
Using Trimble Nova to calculate thermal insulation
Trimble Nova represents a significant advance in the field of thermal calculations, offering a complete solution for calculating thermal loads in compliance with SIA 384/2:2020:
Visualize thermal resistances
Precise temperature determination
Estimate wall surfaces, facilitating a complete thermal analysis of buildings.
One of Trimble Nova's major assets is its ability to adapt to the specific requirements of each project. Whether for new buildings or renovations, the software provides precise, customized calculations, essential for establishing a reliable thermal balance. With advanced functions such as numerical simulation and thermal bridge calculation in compliance with NF EN ISO 10211, Trimble Nova helps users identify critical areas for thermal insulation and plan targeted interventions.
For complex projects, it is advisable to complement the Trimble Nova assessment with a more in-depth study by a thermal engineering consultancy. These experts can use the data provided by the software to carry out detailed energy audits, taking into account factors such as the thermal conductivity of materials, thermal bridges and thermal phase shift.
Thanks to Trimble Nova's advanced capabilities, building professionals can achieve optimum thermal optimization, in compliance with TH Bât regulations and other construction industry standards.
Find out how Trimble Nova can help you optimize the thermal insulation of your buildings and comply with the most stringent regulations.
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