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Thermal equipment for heat and cold generation [820760]
Teaching Unit (for year 2):
Thermal equipment for heat and cold generation
Face-to-face time
40hours
40
Student workload
85hours
85
ECTS
5
5
Responsible Teacher
Carles OLIET
Universistat Politecnica de Catalunya
CTTC - Thermal engines department
Pedagogic Team
Joaquim RIGOLA
Universistat Politecnica de Catalunya
CTTC - Thermal engines department
Jesús CASTRO
Universistat Politecnica de Catalunya
CTTC - Thermal engines department
Aims of the teaching
The purpose of this course is to have deep knowledge from the basic, phenomenological, and numerical point of view about actual thermal equipment for heat and cold generation.
The structure is divided in two main blocks, one related to compression systems, and the second on absorption systems. Both oriented with an approach combining the study of the system and its components, while considering the variants related to the final application.
Heating and cooling systems by vapour compression:
Fundamentals and background, baseline system and its variants related to performance improvement (internal receivers, vapor injection, internal heat exchangers) and the application (transcritical cycle, cascade, liquid-overfeed systems, etc. ).
Multi-level engineering analysis of a particular application (domestic refrigerator), combining thermal systems simulation, advanced models for components, CFD, experiments.
Heat pumps: fundamentals, applications/configurations, high temperature heating (new refrigerants), drying applications (combining heat and cold).
Heating and cooling systems by air compression: Brayton cycles and their particular implementation as cooling/heating of aircrafts. Innovative layouts combining with vapor compression cycles. More electrical aircraft system evolution.
Ejectors: concept, phenomenology and 1D modelling (gas-gas). .Applications in refrigeration, vapor compression systems, air-to-air applications. Innovation trends about variable geometry and combination with other technologies like absorption systems.
Cooling and Heating systems by absorption: Deep analysis of physical principle, thermodynamic analysis of absorption cycles. Fluid refrigerants. Analysis of main components and auxiliary elements. Full system scan and absorption cycle: design and prediction. Use of zero-dimensional models and global balances. Study of the influence of external conditions on the system. The course will introduce the main solar heating options, while emphasizing the link of absorption systems with solar heat sources.
It aims at teaching the students:
Review the basics of thermodynamics and heat transfer phenomena and mass (second law of thermodynamics, conservation equations, etc.), in the context of the technological field of thermal systems and equipment generating heat and cold.
Description of the main technical options for refrigeration systems/heating. Technological peculiarities depending on the application. The main approach is to show the different systems, while understanding the underlying reason of such configuration, and the fundamental phenomena related to its components.
Meanwhile, the lessons will be plenty of references to research projects and the tools used therein, numerical and/or experimental depending on the case. In this sense, it will be highlighted the application of advanced methods of numerical simulation analysis of items of equipment with one-dimensional fluids, considering transient effects and specific phenomena like phase change on the refrigerant or condensation/frost formation on the airside. The subject will also introduce the most advanced calculation methods of items of equipment generating heat and cold when the multidimensional analysis of fluids is unavoidable or necessary.
Regarding the analysis of the systems, different tools and examples will be analysed as well to capture their approach to provide system-level design conclusions. Cycle thermodynamic analysis will be also performed by the student considering variable properties, trying to incorporate programming skills to foster the future application of intensive computation or optimization techniques.
Intended Learning outcomes (measured by the assessment)
Learning activities and approach
E-learning (online)
Lectures (onsite)
30h
Tutorials (onsite)
10h
Useful information
Location
- Escola Tècnica Superior d’Enginyeries Industrials de Barcelona (ETSEIB)
Practical work equipment
-
Other information
-
Assessment method
Practical work group, proposed exercises, written exam (the percentage distribution is detailed in UPC courses guides
Prerequisites
Fundamentals of thermodynamics, fluid mechanics and heat transfer necessary to understand the operation of thermal equipment generating heat and cold.
Related literature
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