Course Details

Thermal engineering

BHB005 course is part of 3 study plans

Bc. full-t. program BPC-SI > spVS compulsory-elective Summer Semester 2nd year 4 credits

Bc. full-t. program BPA-SI compulsory Summer Semester 2nd year 4 credits

Bc. combi. program BKC-SI compulsory Summer Semester 2nd year 4 credits

Thermal resistance of the structure. Thermal transmittance. Surface temperature of the budilding structure. Temperature evaluation in the structure. Average thermal transmittance if the building envelope. Interstitial condensation and evaporation. Thremal stability of the room. Air permeability of the building envelope.

Course Guarantor

prof. Ing. Milan Ostrý, Ph.D.

Institute

Institute of Building Structures

Learning outcomes

Graduate will acquire basic knowledge in the field of thermal engineering. The graduate will be able to:
- calculate and evaluate U-value of composite building structures,
- calculate and evaluate average U-value of building envelope,
- calculate and evaluate indoor surface temperatures of external structures,
- calculate and evaluate the water vapour transfer in the building structure,
- calculate and evaluate room thermal stability in winter and summer.

Prerequisites

Knowledge of the fundamental physical values, thermal properties of building materials and compositions of building structures.

Corequisites

Knowledge of the correct design of building structures, knowledge of the properties of thermal insulation materials.

Planned educational activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations. Course lectures are supplemented by presentation of examples of good practise. Suitable software for calculation will be used during excercises.

Forms and criteria of assessment

Successful conclusion of the course requiers:
- completing exercises with compulsory attendance and granting credit,
- passing a written exam (after obtaining th

Objective

Introduction course to the thermal protection of buildings, design requirements for thermally insulated buildings envelopes and constructions, assessment of indoor thermal and visual and acoustic comfort.

Specification of controlled instruction, the form of instruction, and the form of compensation of the absences

Vymezení kontrolované výuky a způsob jejího provádění stanoví každoročně aktualizovaná vyhláška garanta předmětu.

Lecture

1 hours/week, 12 weeks, elective

Syllabus of lectures

1. Introduction, motivation, historical development, related laws, regulations, standards, heat transfer.
2. Thermal properties of building materials, sources of information, definition of thermal comfort.
3. Boundary conditions for calculations, definition of steady state thermal field, thermal resistance, total therma resistance.
4. Thermal transmittance - calculation when considering one-dimensional or two-dimensional heat transfer, evaluation, influence of reflective properties of materials.
5. The average (overal) thermal transmittance of the building envelope,the energy label of the building envelope.
6. Temperatures in building structures in steady state temperature field, lowest internal surface temperature of the structure, calculation of the temperature factor at the internal surface and its evaluation.
7. Calculation of the thermal transmittance when of one-dimensional heat transfer cannot be applied, thermal bridges, linear and point thermal transmittance
8. Water vapour tranfer through the building structures, calculation of the interstitial condensation , calculation of the annual balance of interstitial evaporation and condensation and evaluation.
9. Description of non steady temperature field, thermal damping, drop of the touch temperature of the floors and its evaluation.
10. Thermal room stability in summer and winter, definition of critical room, evaluation.
11. Introduction to the energy performance of the building, introduction to the energy performance certificate of the building.
12. Air permeability of building envelope, airtightness measurement, diagnostics of building structures by infrared thermography method.

Practice

2 hours/week, 12 weeks, compulsory

Syllabus of practice

1. Introduction, calculation of thermal resistance and thermal transmittance of existing structures.
2. Design of new structures, thermal insulation of existing structures, drawings of renovated building.
3. Calculation and assessment of thermal transmittance of new structures.
4. Design of windows and doors, calculation of thermal transmittance.
5. Calculation and assessment of average thermal transmittance.
6. Simplified calculation of thermal transmittance of the composite structure.
7. Internal surface temperature and temperature factor at the internal surface .
8. Temperature evolution in the structure.
9. Interstitial condensation.
10. Annual balance of condensed and evaporated water vapour.
11. Assessment of selected structures with the use of selected software.
12. Informative calculation of two-dimensional temperature field using software, credit.