Fundamentos de calor y conceptos de envolvente térmica

Notes

AR3303 CLIMATE & BUILT ENVIRONMENT Ar.Hafila Banu UNIT 3 –HEAT FLOW THROUGH BUILDING ENVELOPE CONCEPTS UNIT III-HEAT FLOW THROUGH BUILDING ENVELOPE- CONCEPTS • The transfer of heat through solids. • Definitions- Conductivity, Resistivity, Specific heat, Conductance, Resistance and Thermal capacity. • Surface resistance and air cavities. • Air to air transmittance (U value). • Time lag and decrement. Material qualities of envelopes. • Exercise involving heat flow through building envelope involving calculations. • Demonstration of software for design analysis. SUBJECT NAME: CBE FACULTY: AR. HAFILA SUBJECT CODE: AR3303 SECTION: II YR , 2024 - 2025 SUBJECT NAME: CBE FACULTY: AR. HAFILA SUBJECT CODE: AR3303 SECTION: II YR , 2024 - 2025 HEAT - Heat is a form of energy, appearing as molecular movement in substances or as ‘radiant heat’, a certain wavelength band of electromagnetic radiation in space. It is measured in joules (J) • The joule is derived from the three basic units: • Length=metre (m) • Mass=kilogram (kg) • Time=second (s) Velocity – A Movement of unit length I unit time, metre per second. Acceleration – a unit change in velocity in unit time, ▪ m/s = meter ▪ m/s2 per second...