- •Міністерство аграрної політики україни
- •Table of Contents. (Зміст)
- •Plate Heat Exchanger. ( The main components).
- •1. Match the words from the left column with their translations in the right
- •2. Make up sentences with the key words.
- •3. Read the text and find the sentences with the key words in the text. Main components.
- •4. Discuss the questions.
- •Vocabulary.
- •A direct expansion evaporator.
- •1 Match the key words with their translations.
- •2. Write your ideas of what you would like to know about a direct expansion evaporator.
- •3. Read the text and say if you have found the answer. A direct expansion evaporator.
- •Vocabulary.
- •Flooded flow
- •Flooded flow.
- •6. Complete the sentences.
- •7. Discuss the questions
- •8. Complete the sentences with the correct form of the verbs in bra-
- •9. Translate these sentences into English.
- •Vocabulary.
- •The basic refrigeration cycle.
- •1. Match the words from the left column with their definitions in the right column.
- •2. Write your ideas of what you would like to know about the basic refrigeration cycle.
- •3. Read the text and say if you have found the answer. The basic refrigeration cycle.
- •4. Find the sentences with the key words in the text guess the meaning. Use a dictionary to check the answer.
- •5. Discuss the questions.
- •1. Read the text, find the sentences with the key words and guess the meaning. Use a dictionary to check the answer. The basic refrigeration cycle. Part 2
- •2. Read the text again. Answer these questions.
- •The expansion process and devices
- •In all types of the refrigeration cycle there is a step where liquid refrigerant is expanded from the condensing pressure to the evaporating pressure. Refrigerant evapo-
- •2. Read the text again and correct the mistakes. Begin your answer with:
- •3. Complete the sentences.
- •4. Give affirmative answers to the following questions according to the given model:
- •5. Complete the with the correct forms of the verbs given in brackets.
- •Vocabulary
- •1. Match the words from the left column with their definitions in the right colomn.
- •2. Write your ideas of what you would like to know about the pressure drop.
- •3. Read the text and say if you have found the answer. Methods to control the pressure drop
- •4. Find the key words in the text and guess the meaning. Use a dictionary to check the answer.
- •5. Discuss the question.
- •Vocabulary.
- •The compressor.
- •1. Match the words with their translation.
- •2. Read the text and answer the questions.
- •Evaporators, condensers and interchangers.
- •1. Match the Key words with their translation.
- •2. Use your knowledge and answer the questions.
- •3. Now read the text quickly and check your guesses. Evaporators, condensers and interchangers.
- •4. Read the text more carefully.
- •6. Make these sentences negative.
- •Vocabulary.
- •Literature.
- •Рецензія
1. Match the words from the left column with their definitions in the right colomn.
1 a valve- a. get back to a primary position,
2.velocity- b. the size or power of something such as an engine,
3.acceleration energy- c. mechanical device for controlling the flow of liquid,
4.recover- gas in one direction only,
5.decelerate- d. quickness, speed,
6 capacity- e.outer opening, hole,
7 orifice- f. making or being made quickly, rate of incre g. diminish speed, opposite to accelerate
2. Write your ideas of what you would like to know about the pressure drop.
3. Read the text and say if you have found the answer. Methods to control the pressure drop
There are three methods to control the pressure drop:
A valve. A multitude of designs exists, but the basic parameter, which is changed, is the
cross section and thus the velocity. Simultaneously the hydrolic diameter changes, the flow changes direction a little the necessary acceleration energy is not fully recovered when
the flow finally decelerates.
Flow length and roughness have little importance
An orifice. The same principle as a valve but fixed.
A capillary tube, which is a thin long tube usually spiral wound to save space. All the parameters above are important and have to be balanced with each other.
Compared to an orifice, which is a hole in a wall, the cross section can be made larger
as the flow length plays an important part for the pressure drop. This is important for small
capacity devices, where an orifice would require such a small hole that it could easily be
clogged by wear and tear products.
It is usually a fixed design used for small systems such as refrigerators.
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4. Find the key words in the text and guess the meaning. Use a dictionary to check the answer.
5. Discuss the question.
1.How many methods of control are there?
2.What is the basic changeable parameter?
3.What changes simultaneously with this parameter?
4. Is acceleration energy fully recovered?
5. Are flow length and roughness of great importance?
6. Why is a capillary tube usually spiral?
7. Is the length of the tube important?
Vocabulary.
exist- существовать .
roughness- шероховатость
multitude- множество
length- длина
tube- трубка
compared to...- по сравнению с...
wound- свернутый
balanced- согласованный
drop - снижение
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The compressor.
Key words.
vapour, pressure, knocking, scroll, evaporator, hammering, piston, screw, oil, function,
compress, content.