- •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
2. Read the text again and correct the mistakes. Begin your answer with:
a) as far as I know,
b) as far as I remember,
c) as far as I understand.
1. In all types of the refrigeration cycle there is no step where liquid refrigerant is expanded
from the condensing pressure to the evaporating pressure.
2. Refrigerant evaporates and simultaneously heats to the evaporation temperature.
3. A pressure drop on the fluid is not equal to the difference between the condensation
and evaporation pressure for the actual refrigerant flow rate.
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4. All these parameters could not be used to control the pressure drop.
5. The number of directional changes and the flow length are not closely interrelated.
3. Complete the sentences.
1. In all types of refrigeration cycle there is………..
2. Refrigerant evaporates and…………..
3. It is difficult………………..
4. The expansion device could be…………..
4. Give affirmative answers to the following questions according to the given model:
- Does the vapour enter the final condenser a little superheated?
- Yes, of course. The vapour enters the final condenser a little superheated.
1. Does refrigerant evaporate and simultaneously cool down to the evaporation temperature?
2. Does fluid dynamic theory teach us that the pressure drop increases with increasing
of the surface roughness?
3. Does fluid dynamic theory teach us that the pressure drop increases with decreasing
of the hydraulic diameter Cross-section area?
4. Is it difficult to imagine a device, which uses the surface roughness?
5. Complete the with the correct forms of the verbs given in brackets.
1. Refrigerant usually (cool down)____to the evaporation temperature.
2. Refrigerant (cool down)________to the evaporation temperature now.
3. Refrigerant (cool down) ____ just _____ to the evaporation temperature.
4. Refrigerant (cool down)______ to the evaporation temperature five minutes ago.
Vocabulary
evaporating pressure - давление испарения
exert - осуществлять
acceleration - скорость
length - длина
de/acceleration
device - устройство
condensation - конденсация
refrigerant - хладагент
expansion - расширение
roughness - шероховатость, неровность
drop - падение
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interrelated - взаимодействующие
simultaneously - одновременно
surface - поверхность
flow length - длина трубы
Methods to control the pressure drop.
Key words
a valve, cross section, velocity, hydraulic, diameter, acceleration energy, recover, decelerate, flow, orifice, capillary tube, pressure drop, capacity, clog, wear and tear.