ENGLISH FOR REFRIGERATION AND AIR CONDITIONING

intervals as the Celsius scale, so that ice melts at + 273.16 K andwater at atmospheric pressure boils at + 373.15 K.1.2 HeatRefrigeration is the process of removing heat, and the practicalapplication is to produce or maintain temperatures below theambient. The basic principles are those of t[r]

3. The residential and lodging sector consists of hotels, motels, apartment houses, and privatehomes. Many systems serving the lodging industry and apartment houses are operated continu-ously, on a 24-hour, 7-day-a-week schedule, since they can be occupied at any time.4. The hea[r]

more a mend the technic to others who may want this type of service. When heating, air conditioning, and refrigeration equipment is working at peak efficiency, power generating plants cm be operated at less than h11 capacity. The power company not only saves on operatin[r]

these ODSs are being phased out of manufacture and use in the United States. Hydrofluorocarbons (HFCs) and, to a lesser extent, perfluorocarbons (PFCs) are used as sub-stitutes for the regulated ODSs. HFC emissions from the refrigeration and air con-ditionin[r]

intervals as the Celsius scale, so that ice melts at + 273.16 K andwater at atmospheric pressure boils at + 373.15 K.1.2 HeatRefrigeration is the process of removing heat, and the practicalapplication is to produce or maintain temperatures below theambient. The basic principles are those of t[r]

cheap source of low-grade heat or where there are severe limits tothe electrical power available. A modified system of the ammonia–water absorption cycle has been developed for small domesticrefrigerators.2.9 Steam ejector systemThe low pressures (8–22 mbar) required to evaporate water as are[r]

Refer to ASA-B9.1-1953, American StandardsAssociation's "Mechanical Refrigeration Safety Code"when you install the unit.5. Before installing the unit, check the electricservice to insure that it is adequate. The voltage at themotor terminals must not vary more than plus or minus10 percent of[r]

for almost all compressors.26. The first step in installing the oil pump andbearing head is to install the rotor retaining ring in thering groove of the rotor, with the chamfered edge towardthe compressor. Compress the retaining spring and insertthe pump rotor into the bearing head.27.[r]

corrective signal.3. In this chapter we will discuss vacuum tubes,amplification, semiconductors, transistor circuits, bridgecircuits, and discriminator circuits. We will relateamplifier, bridge, and discriminator circuits to electroniccontrols. Electronic controls are becoming popular[r]

www.munters.com/home.nsf/FS1?ReadForm&content=/products.nsf/ByKey/OHAA-55GSWHNational Productivity Council, Ministry of Industries, India. Technology Menu on Energy Efficiency. Plant Services Magazine. www.plantservices.comUS Department of Energy, Energy Efficiency and Renewable Energ[r]

require adjustment, depending upon the evaporatortemperature. Check the high-pressure cutout bythrottling the condenser water. This will allow the headpressure to rise gradually. The cut-out and cut-inpressures should be within 10 to 15 pounds of the valuesoutlined in the manufacturer’s handb[r]

2. Variation of the properties of water vapor attributable to the effect of pressure3. Effect of intermolecular forces on the properties of water vapor itselfFor an ideal gas, Z ϭ 1. According to the information published by the former National Bureauof Standards of the United States, for dry[r]

systems and eyes, but also in their potentially harmful effects on equipment such as filters, vehicles and communication equipment. Sandstorms can last for hours, sometimes even days.Despite this, some cultures have made hot deserts 'their home for thousands of years, inc[r]

Overpressure dampers are used to equalize the pressure between adjacent rooms and for automatic interruption of air supply or air exhaust. Volume control dampers regulate the air flow volume in ventilation ducts and air conditioning devices. Throttling, shut off and non return dampers and flow rate[r]

A significant advantage of supply ventilation in homes is that it creates positive indoor pressure.When a supply fan delivers air to a tight house, the home becomes pressurized, which helpsprevent outdoor pollutants (e.g., radon) from entering and buffers against depressurization,which[r]

a. and b. however c. so d. but 30. The concert was cancelled ________ we went to a nightclub instead. a. so b. however c. so on d. but Error Identification. 32. Desert is a large area of land that has very little water however very few plants growing on it. A B C D 31. Rain falls occasiona[r]

Error Identification.32. Desert is a large area of land that has very little water however very few plants growing on it. A B C D31. Rain falls occasionally in deserts so desert storms are often violent. A B C D33. The Nile River, the Colorado River, but the Yellow River flow through deserts to del[r]

34. Deserts may have underground springs, rivers, or reservoirs they lie close to the surface, or deep underground. 35. Most plants in deserts have adapted to sporadic rainfalls in a desert environments Read the passage carefully and choose the correct answer. A desert is a hostile, potential[r]

deserts, high temperatures cause rapid loss of water due to sweating, and the absence of water sources with which to replenish it can result in dehydration and death within a few days. In addition, unprotected humans are also at risk from heatstroke. Humans may also have to adapt to sa[r]