Course detail

Compressors, Fans and Refrigerating Plants

FSI-LOSAcad. year: 2010/2011

The course is concerned with following topics:Positiv displacement compressors, their application in air conditioning and refrigerating equipments. Mechanical refrigerating systems, their application individual or in air conditioning equipments. Fans as a part of ventilation and air conditioning equipments. The course is devoted to designers and operators of this equipments. Following the previous theoretical courses, basics of machine design, operating parameters calculation and application is discuussed.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

Ing. Bohumil Sekanina, CSc., CSc.

Department

Energy Institute (EÚ)

Learning outcomes of the course unit

Students will acquire basic technical knowledge of compressors, fans and refrigerating systems. Knowledge of design of this equipments. Ability to judge the availability of designed or mounted devices from technical, economical and ecological viewpoints.

Prerequisites

Thermodynamics of gases and vapours, thermodynamic cycles, thermofluid mechanics, heat transfer.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Written and oral examination. Calculation tasks.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

Students acquire basic knowledge of machines ensuring gas and vapour distribution and circulation in power engineering, ventilation, refrigeration.

Specification of controlled education, way of implementation and compensation for absences

Course-unit credit requirements:active participation in lessons.
Missed seminars may be compensated by calculation of individual assignments.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Dvořák,Z.: Chladicí technika, SNTL, Praha 1971
Eck,B.: Fans,Pergamon Press, Braunschweig 1973
Chlumský, V., Liška,A.: Kompresory, SNTL, Praha 1977

Type of course unit

Lecture

26 hod., optionally

Teacher / Lecturer

Ing. Bohumil Sekanina, CSc., CSc.

Syllabus

I.Compressors. Performance of positive displacement compressor. Reciprocating compressors.
Rotary and special positive displacement compressors.
Compressor capacity control. Accessories. Compressor stations.
II.Mechanical refrigerating systems. Vapour compression cycle (simple- and multiple-stage)
Absorption refrigeration
Ejector refrigeration
Air-cycle refrigeration.Thermoelectric cooling.
Refrigerating system control, automatics. Indirect refrigerating systems.
III.Fans. Types, principal parts, technical parameters. Dimensionless coefficients.
Centrifugal fans.
Normal axial-flow fans.
Constant-pressure, meridionally accelerated, crossflow fans.
Operating behaviour of a fan. Performance of fans connected to any duct system. Experimental testing of fans.

Exercise

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Jaroslav Katolický, Ph.D.

Syllabus

Volumetric and energy design of reciprocating air compressor.
Multistage compressor design, intercoolers.
Calculation of air receiver, reducer, safety valve.
Calculation of simple stage vapour compression cycle.
Calculation of two stage vapour compression cycle.
Calculation of absorption refrigeration cycle.
Calculation of ejector refrigeration cycle.
Calculation of thermoelectric cooling system.
Calculation of air-cycle refrigeration system.
Calculation of main dimensions of centrifugal fan and spiral housing.
Calculation of main dimension of normal axial-flow fan.
Calculation of main dimension of constant-pressure fan.
Two fans working together, effect of diameter and speed changes – calculation of resultant characteristics.

VUT

Faculties

University Institutes

Parts

Compressors, Fans and Refrigerating Plants

Type of course unit