Energy efficiency and building thermophysics
Learning outcomes of the course unit
Provide students with the ability to calculate the sasonal energy needs of buildings.
Physics and mathematics
Course contents summary
Heat transfer in buildings. Heat losses. Sasonal energy needs, heating and air conditioning.
Dynamic and thermal behavior of fluids. Viscosity and rheology. Open system, mass and energy conservation. Heat transfer. Conduction, convection and radiative heat transfer. Thermal resistance, transmittance, global coefficient. Power between a building and the sky (outflow). The mean radiant temperature, the globetermometer. Air temperature and operating temperature. Heat exchangers. Efficiency and Number of Transfer Units. Radiators, convectors, fan coils. Wall-hung heating bodies. Radiant panels. The glazing, frame and thermal bridge of the spacer, overall transmittance. Low emissive glasses, transparency, solar factor, solar area. Losses from the box and darkening closures. Solar energy supplies on buildings, opaque components and transparent components. Irradiance, irradiation, shading factor. Interior heat gain (appliances, lighting, cooking, metabolic heat). Thermal bridges, linear coefficient. Typologies and abacus of thermal bridges. Air in confined spaces, ventilation. Transmission losses (opaque and transparent surfaces, to external or internal environments). Transient heat transfer in buildings. Effect of physical properties of materials. The wave of temperature, amplitude and phase shift. Transient in the absence of air conditioning. Duration of winter and summer air conditioning season. Day Degrees and Climate Areas. The ideal (or useful) and primary energy requirement. The utilization factor and the building time constant. Criteria to enhance the energy efficiency of the building. Requirements and installation. Generation, accumulation, distribution, regulation, emission. Heat output, regulation, distribution, accumulation, generation. Criteria for better efficiency of the air conditioning system. Air thermophysics in buildings; Physiological well-being. Composition, humidity, temperature, enthalpy. Dew temperature. The psychrometric chart. Transformations in most air, mass conservation and enthaly balance. Sensitive and latent heat. Winter and summer air conditioning, air supply. Surface vapor condensation of humid air on the interior surfaces of the building enclosure. Interstitial condensation, Glaser analysis.
Teacher's clipboard and papers, available online for the students.
Frontal lesson, euristic lesson, case study, role playing.
Assessment methods and criteria
Written or oral test