-
How Air Conditioners Work and energy conservation technology research Abstract： An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling. The mechanics of the Freon evaporation cycle are the same in a refrigerator as in an air conditioner. Keywords： water towers 、weather-resistant、 compressor、energy conservation When the temperature outside begins to climb, many people seek the cool comfort of indoor air conditioning. Like water towers and power lines, air conditioners are one of those things that we see every day but seldom pay much attention to. Wouldn't it be nice to know how these indispensable machines work their magic? In this article, we will examine air conditioners – from small to huge -- so you know more about what you're seeing! 34144
- 上一篇：分馏塔结构英文文献和中文翻译
- 下一篇：振动磨机英文文献和中文翻译
The Many Faces of Cool Air conditioners come in various sizes, cooling capacities and prices. One type that we see all the time is the window air conditioner. Window air conditioners are an easy and economical way to cool a small area. Most people who live in suburban areas usually have one of these in their backyard: If you live in an apartment complex, this is probably a familiar sight: Most businesses and office buildings have condensing units on their roofs, and as you fly into any airport you notice that warehouses and malls may have 10 or 20 condensing units hidden on their roofs: And then if you go around back at many hospitals, universities and office complexes, you find large cooling towers that are connected to the air conditioning system: Even though each of these machines has a pretty distinct look, they all work on the same principles. Let's take a closer look. The Basic Idea An air conditioner is basically a refrigerator without the insulated box. It uses the evaporation of a refrigerant, like Freon, to provide cooling. The mechanics of the Freon evaporation cycle are the same in a refrigerator as in an air conditioner. According to the Merriam-Webster Dictionary Online, the term Freon is generically "used for any of various conditioner. According to the Merriam-Webster Dictionary Online, the term Freon is generically "used for any of various nonflammable fluorocarbons used as refrigerants and as propellants for aerosols." This is how the evaporation cycle in an air conditioner works (See How Refrigerators Work for complete details on this cycle): 1.The compressor compresses cool Freon gas, causing it to become hot, high-pressure Freon gas (red in the diagram above). 2.This hot gas runs through a set of coils so it can dissipate its heat, and it condenses into a liquid. 3.The Freon liquid runs through an expansion valve, and in the process it evaporates to become cold, low-pressure Freon gas (light blue in the diagram above).
4.This cold gas runs through a set of coils that allow the gas to absorb heat and cool down the air inside the building. Mixed in with the Freon is a small amount of a light weight oil. This oil lubricates the compressor. Window Units A window air conditioner unit implements a complete air conditioner in a small space. The units are made small enough to fit into a standard window frame. You close the window down on the unit, plug the unit in and turn it on to get cool air. If you take the cover off of an unplugged window unit, you will find that it contains: A compressor An expansion valve A hot coil (on the outside) A chilled coil (on the inside) A control unit The fans blow air over the coils to improve their ability to dissipate heat (to the outside air) and cold (to the room being cooled). BTU and EER Most air conditioners have their capacity rated in British thermal units (BTU). Generally speaking, a BTU is the amount of heat required to raise the temperature of one pound (0.45 kg) of water 1 degree Fahrenheit (0.56 degrees Celsius). Specifically, 1 BTU equals 1,055 joules. In heating and cooling terms, 1 "ton" equals 12,000 BTU. A typical window air conditioner might be rated at 10,000 BTU. For comparison, a typical 2,000-square-foot (185.8 m2) house might have a 5-ton (60,000-BTU) air conditioning system, implying that you might need perhaps 30 BTU per square foot. (Keep in mind that these are rough estimates. To size an air conditioner for your specific needs, contact an HVAC contractor.) The energy efficiency rating (EER) of an air conditioner is its BTU rating over its wattage. For example, if a 10,000-BTU air conditioner consumes 1,200 watts, its EER is 8.3 (10,000 BTU/1,200 watts). Obviously, you would like the EER to be as high as possible, but normally a higher EER is accompanied by a higher price. Is the higher EER is worth it? Let's say that you have a choice between two 10,000-BTU units. One has an EER of 8.3 and consumes 1,200 watts, and the other has an EER of 10 and consumes 1,000 watts. Let's also say that the price difference is $100. To understand what the payback period is on the more expensive unit, you need to know:
-
兰州某大酒店空调设计+CAD图纸
-
新能源空调系统设计英文文献和中文翻译
-
RANSAC算法全景图像拼接关键技术研究+源程序
-
模拟退火技术来设计英文文献和中文翻译
-
超市空调系统英文文献和中文翻译
-
数字通信技术在塑料挤出...
-
快速成型制造技术英文文献和中文翻译
上市公司股权结构对经营绩效的影响研究
高警觉工作人群的元情绪...
浅析中国古代宗法制度
C++最短路径算法研究和程序设计
g-C3N4光催化剂的制备和光催化性能研究
中国传统元素在游戏角色...
现代简约美式风格在室内家装中的运用
巴金《激流三部曲》高觉新的悲剧命运
江苏省某高中学生体质现状的调查研究
NFC协议物理层的软件实现+文献综述