Refrigeration and Heat Pumps

Code:

EM0121

Acronym:

RBC

Keywords
Classification	Keyword
OFICIAL	Heat Transfer and Fluid

Instance: 2020/2021 - 1S

Active?	Yes
Responsible unit:	Fluids and Energy Section
Course/CS Responsible:	Master in Mechanical Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MIEM	7	Syllabus since 2006/2007	5	-	6	45,5	162

Teaching language

Portuguese

Objectives

Knowledge, understanding and analytical capacity of refrigeration systems and heat pumps.

Learning outcomes and competences

Expected results: know how to size refrigerators systems.
Skills: analytical capacity to analise refrigeration systems.

Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

Knowledge of Thermodynamics, Fluid Mechanics and Heat Transfer.

Program

">Introduction: definition and objectives
Cold chain; Refrigeration and freezing; ">chilling methods;
Analysis of the vapor compression cycle: influence of various parameters on the COP; cascade ">cycles;
">Analysis of absorption cycle: constitution, binary mixtures, influence of various parameters on the COP;
">Adsorption cycle: constitution and its thermodynamic analysis
">Thermoelectric cycle: constitution and its thermodynamic analysis
">Ejection cycle: constitution and its thermodynamic analysis
">Air cycle: constitution and its thermodynamic analysis
">Components of refrigeration machines: sizing bases.
Refrigerants: refrigerants groups and its designation; characteristics of refrigerants; problem of depletion of the ozone layer and greenhouse effect; ">new refrigerants.
Thermal loads: heat output exchanged across the border of the refrigerator; calorific power generated inside the refrigerator and its relation to the type of product to be preserved; thermal bridges; condensation.
Heat pump technologies.

Mandatory literature

Clito Afonso; Refrigeração, AEFEUP, 2013. ISBN: 978-989-98632-0-0
Clito Afonso e Manuel castro; Problemas de Refrigeração, AEFEUP, 2012

Complementary Bibliography

W.F. Stoecker, J. W. Jones; Refrigeration and air conditioning. ISBN: 0-07-066591-5

Teaching methods and learning activities

In theoretical classes the matter is exposed through power point. In theoretical and practical classes thye bstudents must learn a code to solve refrigeration systems. Students must still over the semester to solve at home a set of problems.

Evaluation Type

Evaluation with final exam

Assessment Components

Designation	Weight (%)
Exame	70,00
Trabalho laboratorial	30,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Elaboração de projeto	20,00
Total:	20,00

Eligibility for exams

As per the rules in force.

Calculation formula of final grade

Rating: score of the final examination (70%), plus the programing work (%).
Students who undertake the resource test, the final classification will be the higher of those obtained in the two tests.