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Соедините части АВ, чтобы получить законченное высказывание.

А.

1. The condenser is a heat exchanger used to...

2. Typical cooling mediums in condensers...

3. If air is circulated through the evaporator...

4. If water is circulated through the evaporator...

5. The kW of thermal cooling capacity must not...

6. Toxicity is based...

7. Recent federal regulations have placed...

B.

■...are air and water.

■...reject heat from the refrigerant to a cooling medium.

■...be confused with the electrical power amount to produce the cooling effect.

■...it is called a chiller.

■...restrictions on the production and use of CFCs and HCFCs.

■...on the upper safety limit for airborne exposure

■...it is a direct expansion system.

ü What is a condenser?

ü What is an evaporator?

ü What is a direct expansion system?

ü What is called a chiller?

ü What is toxicity based on?

■come, unitary and portable AC systems, room air conditioners, in two forms;

■ not only to, the refrigerant works, cool, but, also, dehumidify it, in the room, the air;

■air conditioning technologies, innovation, in, continues,and,im- proving, indoor air quality, emphasizes on;

■a wet sponge, to draw, an evaporative cooler,is,outer air, through, soaked, with water;

■ for venting, portable, air conditioners, all refrigerated type, re- quire, exhaust hoses.

ü In either case the refrigerant does not come into direct contact with air or water.

ü The kW of thermal cooling capacity must not confused with the amount of electrical power (also expressed in kW) required to produce the cooling effect.

ü Recent federal regulations and international agreements have placed strong restrictions on the production and use CFCs and HCFCs; it is HFCs that are being used instead of CFCs and HCFCs.

split system — раздельная система отопления и вентиляции;

fan system — система вентиляции;

vent flue — вентиляционный канал;

trunk duct— воздуховод;

discharge chamber— камера выпуска;

exhaust fan — вытяжной вентилятор;

to facilitate — способствовать, облегчать;

foul flues—взвешенные частицы (в воздухе);

exhaust flue — вытяжка, вытяжной канал;

hot-blast system — система подачи горячего воздуха;

radiator — радиатор, батарея, излучатель;

heating coil — нагревательный элемент, калорифер;

discharge opening — выпускное отверстие;

heat loss — потеря тепла.

3. Прочитайте текст и выполните задания.

Ventilation Systems

[if a regular air supply is needed, mechanical moving air is the on­ly adequate method.]⁰ The most popular one is a split or fan system for air ventilation at about room temperature. The split system is mod­ified to buildings with ventilation for certain periods of the time (of­fices, school buildings, etc). The precise temperature is maintained by the radiators; the fan system is operated if ventilation is crucial.

[Ventilation is to remove air at a supplied rate, a system of vent flues being provided for the purpose.]⁰ The flues from the separate rooms joining together in a trunk duct go ahead to a common dis­charge at the roof. The attic can be used as a discharge chamber, the flues leading directly to it. An exhaust fan is installed to facilitate the
foul flues removal at a velocity from 1,200 to 1,500ft per minute. In three- or four-storey buildings where the friction in exhaust flues is significant, an exhaust fan is known advantageous.

[The hot-blast system is attractive in industrial buildings as a means of supplying fresh air to replace fumes or moisture from man­ufacturing processes.]⁰ This system is predominantly popular if there is no space for radiators. Since such buildings are not often divided into many rooms, the air is supplied at a constant temperature through a trunk ducts system, the heating coils being placed on the suction side of the fan discharged directly into main duct.

Discharge openings are made in columns on each floor. The trunk and branch ducts are to be well insulated for the heat losses from im­perfectly insulated ducts are significant.

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Дата добавления: 2014-12-29