D1. Knowledge and understanding: knowledge of heating and cooling plants, design for low energy consumption and renewables, understanding the relation between systems, impact of electrification on heating and cooling systems, knowledge of the regulatory system.
D2. Applying knowledge and understanding: Ability in selecting and sizing plant components, for heating and cooling
D3. Making judgments: the students will demonstrate proficiency in making choices during the development of a final project regarding the whole design of a system plant.
D4. Communication skills: the students will be required to described and justify the choices taken during project development.
D5. Learning skills: the project will be developed with autonomy from the beginning, gathering information from specialized literature and commercial information from manufactures.

Applied physics, thermodynamics and heat transfer. It is required a deep knowledge of heat transfer mechanisms, conduction, convection and radiation. Furthermore, the knowledge of moist air is prerequisite with the capability of treating the parameters: humidity ratio, relative humidity, enthalpy. Transformations and representation on thermodynamic plane are also required.

THERMAL COMFORT
energy balance on the human body, metabolic heat generation, insulation of clothing ensembles, environmental parameters, comfort indices PMV, PPD
HEATING LOAD CALCULATIONS
Heat transfer calculations: application of standard UNI EN 12831, wall transmittance, thermal bridges, heat transfer in windows, above and below grade heat transfer in buildings, unheated areas, degree days, ventilation heat loss.
HEATING PLANTS
Design: basic design heat loss computation.
Radiators: installation, Heat output variation with fluid temperature.
Hydronic system, pipe layout, series-loop, two-pipe direct-return and two-pipe reverse return systems, manifolds systems. Pipe sizing, Head losses in pipes, head losses in fittings, head loss calibration.
Radiant heating floors: construction, design, characteristic curves, maximum surface temperature, design supply temperature, logarithmic mean temperature difference, design mass flow rate.
Typical hydronic systems: description of simple plant, multi-zone , mixing systems, injection mixing systems, pump selection, valve selection and sizing
Boiler rooms, boiler efficiencies, condensation boiler efficiency, boiler safety systems, expansion tanks, security valve.
Domestic Hot Water systems, production, thermal storage, sizing of thermal storage
Heat pumps, source, insertion in heating and cooling systems, hybrid systems

AIR CONDITIONING PLANTS
Single Zone air conditioning systems, winter and summer conditioning systems, design air flow, Air Handling Unit (AHU) components sizing. Heating and reheating coils, cooling coils, air washers. Description of multiple zones systems, reheat and dual duct systems.
Air distribution duct design, Duct layout and sizing procedures, equal friction method, static regain method.
COOLING SYSTEMS
Refrigerants, Properties, Lubricants, Refrigerant Blends, Environmental Impact ODP, GWP, TEWI. Ashrae classification, secondary refrigerants
Chillers, Refrigerant lines, distribution of chilled water
Evaporators and Condensers, overall heat transfer coefficients, heat exchangers, extended surface coils
Direct expansion systems, VRF and VRV systems

lecture notes, slides. Spreadsheet for exercises. All material available in Moodle2 http://moodlde2.units.it other suggested texts available in the Library. Thermal Environmental Engineering 3rd Edition, by Thomas Kuehn (Author), James Ramsey (Author), James Threlkeld (Author) Heating, Ventilating, and Air Conditioning: Analysis and Design Faye C. McQuiston, Jerald D. Parker, Jeffrey D. Spitler, John Wiley & Sons Inc, 2023 Principles of Heating, Ventilation, and Air Conditioning in Buildings John W. Mitchell, James E. Braun John Wiley & Sons, 2014 Handbook of air conditioning and refrigeration, second ed. Shan K, Wang 2001 McGraw-Hill Education (accessible through accessengineering) New York : Routledge, c2021

THERMAL COMFORT
energy balance on the human body, metabolic heat generation, insulation of clothing ensembles, environmental parameters, comfort indices PMV, PPD
HEATING LOAD CALCULATIONS
Heat transfer calculations: application of standard UNI EN 12831, wall transmittance, thermal bridges, heat transfer in windows, above and below grade heat transfer in buildings, unheated areas, degree days, ventilation heat loss.
HEATING PLANTS
Design: basic design heat loss computation.
Radiators: installation, Heat output variation with fluid temperature.
Hydronic system, pipe layout, series-loop, two-pipe direct-return and two-pipe reverse return systems, manifolds systems. Pipe sizing, Head losses in pipes, head losses in fittings, head loss calibration.
Radiant heating floors: construction, design, characteristic curves, maximum surface temperature, design supply temperature, logarithmic mean temperature difference, design mass flow rate.
Typical hydronic systems: description of simple plant, multi-zone , mixing systems, injection mixing systems, pump selection, valve selection and sizing
Boiler rooms, boiler efficiencies, condensation boiler efficiency, boiler safety systems, expansion tanks, security valve.
Domestic Hot Water systems, production, thermal storage, sizing of thermal storage
Heat pumps, source, insertion in heating and cooling systems, hybrid systems

AIR CONDITIONING PLANTS
Single Zone air conditioning systems, winter and summer conditioning systems, design air flow, Air Handling Unit (AHU) components sizing. Heating and reheating coils, cooling coils, air washers. Description of multiple zones systems, reheat and dual duct systems.
Air distribution duct design, Duct layout and sizing procedures, equal friction method, static regain method.
COOLING SYSTEMS
Refrigerants, Properties, Lubricants, Refrigerant Blends, Environmental Impact ODP, GWP, TEWI. Ashrae classification, secondary refrigerants
Chillers, Refrigerant lines, distribution of chilled water
Evaporators and Condensers, overall heat transfer coefficients, heat exchangers, extended surface coils
Direct expansion systems, VRF and VRV systems

frontal lecture, exercises with specific computer codes and development of spreadsheets.

course material available at the site
http://moodle2.units.it

Oral examination with questions regarding the whole course arguments ((knowledge and
understanding). The student must present a building heating and cooling plant project according to Italian regulations comparing different solutions (applying knowledge and understanding), justifying the decision made during the design process(making judgments and communication skills)
The final grade is computed takin into account the project evaluating the presentation and the implemented solutions, (40%) and the answers to the questions (60 %)

3 Good Health and Wellbeing: The thermohygrometric well-being is fundamental for the health of the occupants. 7. Affordable and Clean Energy: the course is totally aimed at the fulfilling this goal. The air conditioning of buildings absorbs 40% of consumption in industrialized countries 9 Industry, Innovation and Infrastructure: the use of renewable energy sources is essential in order to reduce emissions, the Use of RES is part of the course 11. Sustainable Cities and Communities: sustainability is linked to consumption for air conditioning. Part of the teaching concerns the CAMs as required by current regulations. 13. Climate Action: the reduction of emissions is essential. Furthermore, climatic data are essential for the calculation of buildings and plant losses