99538 - IMPIANTI TERMOTECNICI E SIMULAZIONE ENERGETICA DINAMICA M

Learning outcomes

At the end of the course, the student possesses the basic knowledge for the design of all-air and mixed conditioning systems as well as for the sizing of mechanical ventilation systems also through the aid of dynamic simulation software. In particular, the student is able to: - Calculate the cooling load and the summer energy requirement of a building; - Sizing the sections of an air handling unit (AHU); - Use dynamic software for the complete modeling of "building-plant" systems.

Course contents

Cooling load calculations. Dynamic behaviour of an envelope component. Complex temperature and heat flux. Dynamic U-value. Weather data for HVAC systems. Building Physics: energy balance of a room. CARRIER method. Solar factor and shading coefficients for transparent elements. Solar radiation gain and artificial lighting terms. Equivalent temperature difference. Evaluation of the latent heat. Italian standard UNI-TS 11300-1: evaluation of the summer energy need of a building. Energy saving and cooling plants. Shading design. Use of dynamic softwares for the evaluation of energy savings.

Air-Conditioning systems. Classification of Air-Conditioning systems. Behaviour of heating and cooling heat exchangers and their control systems. By-pass factor. Humidifiers. All-air Systems. Multi-zone and single-zone systems. Design of VAV systems. Heat Pumps and Heat Recovery systems. Free cooling. Air-and-Water systems. Indoor air quality. Duct design and Space air diffusion. Engineered Refrigeration Systems.

Energy dynamic simulations. Introduction to the modelling of building physics. An overview of the TRNSYS software. Examples of numerical dynamic models of buildings and HVAC systems.The ALMAbuild software.

Readings/Bibliography

ASHRAE Handbook "Fundamentals" (SI edition)

ASHRAE Handbook "HVAC Systems and Equipment" (SI edition)

Pdf of the complete set of slides used during the course.

Teaching methods

Each lesson (in Italian) covers both theoretical and practical aspects. At least, one numerical example is shown for each topic.

Lessons are made by using slides (powerpoint).

Assessment methods

The exam is composed by two tests:

1) one written test (a numerical solution of a design problem)

2) one oral test

Teaching tools

Lessons are made by using slides (powerpoint).

A pdf copy of the slides (in Italian) is available for UNIBO students at virtuale.unibo.it.

Office hours

See the website of Gian Luca Morini