Skip to main content

AIR TEMPERATURE 

Temperature and Temperature Scales 

The temperature of a substance is a measure of how hot or cold it is. Two systems are said to have equal temperatures only if there is no change in any of their observable thermal characteristics when they are brought into contact with each other. Various temperature scales commonly used to measure the temperature of various substances are illustrated in Fig. 2.2. In conventional inch-pound (I-P) units, at a standard atmospheric pressure of 14.697 psia (101,325 Pa), the Fahrenheit scale has a freezing point of 32°F (0°C) at the ice point, and a boiling point of 212°F (100°C). For the triple point with a pressure of 0.08864 psia (611.2 Pa), the magnitude on the Fahrenheit scale is 32.018°F (0.01°C). There are 180 divisions, or degrees, between the boiling and freezing points in the Fahrenheit scale. In the International System of Units (SI units), the Celsius or Centigrade scale has a freezing point of 0°C and a boiling point of 100°C. There are 

100 divisions between these points. The triple point is at 0.01°C. The conversion from Celsius scale to Fahrenheit scale is as follows:
°F 1.8(°C) + 32 


Comments

Post a Comment

Popular posts from this blog

how to work refrigeration cycle work

How Does an Air Conditioner Work? There are  two laws of physics  that we should review before explaining the inner workings of your air conditioning system. Combined Gas Law The first is the relationship between pressure and temperature, known as  the combined gas law  since it combines  Boyle’s Law ,  Charles’s Law , and  Gay-Lussac’s Law : Boyle’s Law  states that the pressure-volume product is constant. Charles’s Law  shows that the volume is proportional to the absolute temperature. Gay-Lussac’s Law  says that the pressure is proportional to the absolute temperature. In simple English, the combined gas law says that whenever you heat up a gas, pressure also increases. And vice versa, whenever you pressurize a gas, heat also increases. If pressure increases, so does its temperature. This is why a tire heats up as you pump it with air. If pressure decreases, so does its temperature. This is why an aerosol can gets colder as you depress the nozzle and relea
2 comments
Read more

HD REFRIGERATOR WALLPAPERS AND BACKGROUND

 HD REFRIGERATOR WALLPAPERS AND BACKGROUND HD Refrigerator  Wallpapers And Backgrounds pics (1 )  is an  HD wallpaper  posted in HD Refrigerator  Wallpapers  category. You can download HD Flowers  Wallpapers And Backgrounds (1)  HD wallpaper for your desktop, notebook, tablet or phone or you can edit the image, resize, crop, frame it so that will fit on your device. visit and download..
1 comment
Read more

DESIGN FOR AIR CONDITIONING SYSTEM

DESIGN FOR AIR CONDITIONING SYSTEM System design determines the basic characteristics. After an air conditioning system is constructed according to the design, it is difficult and expensive to change the design concept. Engineering Responsibilities The normal procedure in a design-bid project includes the following steps and requirements:  1. Initiation of a construction project by owner or developer  2. Selection of design team  3. Setting of the design criteria and indoor environmental parameters  4. Selection of conceptual alternatives for systems and subsystems; preparation of schematic layouts of HVAC&R  5. Preparation of contract documents, working drawings, specifications, materials and construction methods, commissioning guidelines  6. Competitive bidding by contractors  7. Evaluation of bids; negotiations and modification of contract documents 8. Advice on awarding of contract  9. Review of shop drawings and commissioning schedule, operating and
Post a Comment
Read more