Refrigeration Systems 1Laajuus (3 ECTS)

Objective

On completion of the course the student will be able to calculate the energy and power balance of refrigeration systems, draw the refrigerant of a refrigeration process in a logp,h diagram and to calculate starting values for sizing devices in a refrigeration process. The student will recognize the components of cold storages and cooling devices in air conditioning systems, and will be able to describe their significance and operation. The student will be able to determine the measurement values of air conditioning cooling devices, and will be able to make use of the Cool Pack software in process calculation. The student will be able to find out about the standards and regulations of refrigeration systems.

Content

The main parts and operation principle of refrigeration systems. Cooling efficiency factor, coefficient of performance, the energy and power balance of refrigeration systems. Refrigerants and logp,h diagram, refrigeration process and related calculations using the diagram. The wiring and components of cold storages used in a store, the operation principle and purpose of the devices. The cooling process of an air conditioning system and devices for water refrigeration. Instructions, standards and regulations in refrigeration systems. Cool Pack software.

Qualifications

Introduction to HVAC Engineering

Assessment criteria, satisfactory (1)

The tasks in the first part of the test consist of concept defining, recognition tasks, evaluation of statements and brief calculations.
The student is able to verbally explain concepts of refrigeration technology and recognizes the devices, diagrams and markings of refrigeration systems. He or she is able to choose the correct formula of a given set of formulas, remembers the meaning and correct usage of symbols, and is able to apply formula correctly according to given initial data in familiar cases. The student completes the first part of the test with a passing score.
The student is on the required level, has solved and returned one third of the course assignments by the deadline, and has completed the practical assignment. Some of the learning assignments require the use of information technology.

Assessment criteria, good (3)

In addition to the requirements above, the student is able to make use of the course material and his or her own material in the tasks of the second part of the test. The tasks in the second part of the test are extensive calculations.
The student is able to separate the essential from the given initial data, ignore the unessential, and to find or independently evaluate the missing initial data needed for the solution. The student is able to deduce and implement the correct process in multiphase tasks which require multiple initial phases and combining them. The student completes both parts of the test with a passing total score.

Assessment criteria, excellent (5)

In addition to the requirements above, the student is able to solve the most demanding tasks of the first part of the test, which require assessment and reasoning. Further, the student is able to solve the most demanding tasks of the second part of the test, which require a new approach, almost without errors so that he or she completes both parts of the test with a passing total score.
In borderline cases the course grade will be raised by one from the exam grade, if the student has satisfactorily solved and returned two thirds of the course assignments by the deadline.

Further information

Opintojakson arvosana määräytyy tentin, oppimistehtävien ja harjoitustyön perusteella. Tentti on kaksiosainen, ensimmäisen osan tehtävät ratkaistaan ilman omia oheisaineistoja ja toisen osan tehtävät aineistoja apuna käyttäen. Molemmat osat kattavat koko tenttialueen.