Basics for Dimensioning of HVAC Systems (15 cr)

Objective

The student can explain the principles and modes of heat transfer and apply them in heat transfer calculations of a plane, a pipe and a heat exchanger. They are able to design and balance HVAC networks and choose pumps an fans The student is able to dimension gravity ventilation in a residential building. They can explain how moisture transfers in structures and soil. The students recognize properties of building materials and factors related to corrosion. They can explain the principles of sound and apply them in noise calculations of HVAC systems.

Content

Building physics and chemistry (2 ECTS): Vapour diffusion, penetration of humidity in structures and soil, insulation of condensation and diffusion.

Heat transfer and heat exchangers (4 ECTS): Heat transfer of plane wall and cylinder, thermal resistance and overall heat transfer coefficient, temperature distribution in a multilayered plane wall or a cylindrical system, convection correlations and their validity, heat exchangers, logarithmic mean temperature difference, conductance, radiation exchange between surfaces and view factors.


Pipe Networks and Ducting (4 ECTS): Pipe network pressure losses, buoyancy circulation, dimensioning and hydronic balancing of distribution networks, dimensioning of pump and fan. Calculation of pressure losses in ventilation ducts and a duct design and balancing. Basic concepts and definitions of fan technology as well as the most common types of fans and their features. Fan selection. Gravity ventilation.

Sound Technology and Room Acoustics (3 ECTS):
Basics of sound, dependence of distance in sonic wave, intensity level and decibel scale, summation of intensity levels ultrasound. Vibration and its damping. Noise sources and damping principles of the air conditioning system. Target levels in different spaces. Dimensions of air conditioning noise reduction.

Mathematics (2 ECTS): Mathematics related to the contents of the course.

Further information

HEAT TRANSFER AND HEAT EXCHANGERS (Teacher Sergio Rossi, 4 cr): attendance REQUIRED for this part 80%.

Evaluation scale

0-5

Assessment criteria, satisfactory (1)

The students are able to recognize the fundamental concepts and methods associated with the course and are able to solve simple problems.

Assessment criteria, good (3)

In addition to above, the students are able to apply the fundamental concepts and methods associated with the course to simple problems in natural and technical sciences.

Assessment criteria, excellent (5)

The students are able to apply the fundamental concepts and methods associated with the course to more demanding problems in natural and technical sciences.

Assessment criteria, approved/failed

The students are able to recognize the fundamental concepts and methods associated with the course and are able to solve simple problems.

Qualifications

Competences of the following studies: Basics of HVAC systems, Basics of Building Construction and Thermodynamics and Fluid Mechanics