Theoretical background

The calculation of temperature field and heat streams is founded on top of the general concept of base solutions and thermal coupling coefficients.

The theoretical foundation for these concepts for steady state (stationary) calculations can be found within the book „Wärmebrücken (Thermal heat Bridges)“ from W. Heindl, et al. [1] and for the dynamic (transient harmonic, periodic) calculation within writings of K. Kreč [2] .

Main feature of theoretical concepts used here has been directly adopted within the "Thermal Bridges Standard“ EN ISO 10211-1 [3], hence the stringent standard's conformance of the program AnTherm is easily provided.

It is noteworthy to reference the distinctive method of direct and exact determination of temperature factors fRsi which applies to multidimensional (three dimensional) cases also.

The numerical methods used in this program build on top of standard mathematics bibliography [4].

The special subjects and methods of optimal over-relaxation are further described in [5] .

See also: Introduction, Why multidimensional calculation?, European standards on thermal bridges, The over relaxation, Primary Concepts

Articles and essays

• On condensing humidity (dew point)
   
• Calculating equivalent thermal transfer coefficient of air cavities
  
  
• On calculation of Ψ-values (Psi) for a 3 space case: Special consideration: Unheated spaces
   
• On calculation of Ψ-values for building constructions in connection with ground
   
• The air temperature in the unheated basement, a case study
   
  
• Heat losses from large buildings through the ground
   
  
• Methods of thermal heat bridge survey in international perspective
   
• On three dimensional simulation of thermal behaviour of buildings
   
• The building envelope as thermal heat bridge
   
• On the Storage of Heat in Building Components
   
• Transient, multidimensional calculations by an example of components in contact with soil
   
  
• Heat Transfer in Building Constructions in consideration of Heat Sources
   
• A practical method for the assessment of heat bridges with a view to surface condensation
   
• Multidimensional vapour diffusion processes 
   
• On visualization of heat and vapour diffusion stream in three dimensional models
   
• Temperature factor fRsi
   
• Appropriate responses to the complex problem of finding the cause for mould growth? [NEW]
   
• Das Leitwert-Konzept [NEW]
   
• Anmerkungen zur EN ISO 13786 [NEW]
   
• Berechnung der spezifischen Wärmekapazität der Ersatzkonstruktion [NEW]
   
• Die wirksame Wärmespeicherkapazität [NEW]
   
• Wärmeleitung und Wärmespeicherung in plattenförmigen Bauteilen [NEW]
   
  
• Zur Definition der wirksamen Wärmespeicherkapazität [NEW]
   

Bibliography