Building physics

Anotation:

Thermal protection of buildings:

Heat transfer, Fourier laws. Thermal resistance, thermal transmittance. Mean thermal transmittance. Energy performance of buildings. Diffusion and condensation of water vapor. Minimum internal surface temperature, thermal bridges.

Building acoustics:

 

Goals:

Thermal protection of buildings:

Students are introduced to basic principles of heat and moisture transfer in constructions and buildings, to main hygro-thermal requirements and to basic principles of building design from the point of view of thermal protection.

Building acoustics:

 

Lectures:

Thermal protection of buildings:

1. Principles of design of low energy buildings, thermal balance of space, mean thermal transmittance

-  basic principles of design and realisation of low energy and passive buildings

-   heat transfer through building, thermal balance of space

-  mean thermal transmittance (requirements, calculation method, influence of thermal joints)

2. Energy performance of buildings

-   energy need for heating (requirements, calculation method]

-   total energy use (requirements, calculation method)

-   primary energy and CO2 emissions

3. Heat transfer through constructions

-   basic physical principles (conduction, convection, radiation, appearance in materials and constructions)

-   thermal properties of materials (thermal conductivity, emissivity...)

4. Thermal transmittance

-   requirements on thermal transmittance

-   calculation procedures for basic types of constructions (without and with thermal bridges, influence of ground, influence of unheated spaces, corrections)

5. Minimum internal surface temperature

-   minimum internal surface temperature (requirements, calculation procedures, assessment of internal surface condensation risk and mould growth risk, design measures)

-   thermal bridges and joints (appearance in buildings, consequences and risks, possible solutions)

6. Water vapor transfer

-   basic physical principles (adsorption, sorption isotherm, diffusion, efussion, thermodiffusion, surface diffusion, capillary conduction)

-   moisture properties of materials (diffusion coefficient, vapor resistance factor, influence of leakages)

-   water vapor condensation: requirements, calculation procedure (Glaser model, Czech and European standards, annual balance)

 

Building acoustics:

 

Seminars:

Thermal protection of buildings:

1. Mean thermal transmittance, thermal balance of space

-   calculation of mean thermal transmittance of simple low energy family house (FH)

-   set up of thermal balance for FH

-   calculation of internal temperature with and without internal heat source

-   calculation of necessary heat source

-   calculation of energy need for heating during one winter month

2. Energy certificate of building envelope

-   assessment of FH by means of SW

-   energy certificate production

3. Water vapor transfer, moisture balance of space

-   calculation of internal air humidity in FH

-   graphical detection of condensation area in model flat roof

4. Consultations

5. Thermal transmittance and annual water vapor balance

-   calculation of approximate thermal transmittance of construction with thermal bridges

-   calculation of annual water vapor balance for model flat roof with and without ventilated air layer by means of SW

6. Consultations

 

Building acoustics:

 

Ending term:

It is necessary to complete all tasks and pass the exam.

Ratio of the exam on the total evaluation: 100 %.