外文翻译---中央空调监控系统中温、湿度控制的相关问题分析

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1、附 录 附录 A 外文翻译 The Analysis on Related Problems of Temperaure-humidity Control for Monitoring System of Central Air-condition 1 Introduction Green building focus on environmental protection, energy saving, efficient use of resources and materials, especially focus on requirements for air temperature,

2、 humidity, ventilation and cleanliness. Therefore, the use of air conditioning system is more widely. Air-conditioning control system involves many aspects, but more complex tasks to be achieved. It needs support of cold and heat. There are high-power air conditioning unit fan, but its a great energ

3、y. Under the premise of meeting the requirements of users to air environment, only the use of advanced control strategies to control air-conditioning system, can achieve energy conservation and reduce cost of operation. The following will make a brief discussion about perspective problems with the m

4、onitoring system from control strategy. 2 systems basic structure and working principle Structure and composition of air-conditioning system generally include the sections: (1) Part of the new wind Air-conditioning system during operation to capture part of the outdoor fresh air (ie fresh air), this

5、 part of the fresh air to meet indoor staff required minimum fresh air volume, so air conditioning system of fresh air taken into the amount determined by air-conditioning system service uses and hygiene requirements. The new wind into the general population in the surrounding areas from pollution.

6、These new wind into port and air conditioning systems and new air ducts installation of new wind Dust (new style air filter), new air heaters (also known as air-conditioning system in a heater) came together to form a new air system air conditioning system. (2) Part of air purification Air-condition

7、ing system according to their different uses, purification of air in different ways. Therefore, in the air purification system has set an initial effect of a simple air filter cleaning system, but also set an initial effective air filter and air filter efficiency level of the general purification sy

8、stem, in addition to setting an initial efficiency air filters, one in the efficiency of air filters and a HEPA filter for three high-purification system filter. (3) Part of the air heat, wet Air heating, humidification and cooling, dehumidification, will combine the process, known as the air condit

9、ioning system, heat, wet part. In the air to heat, wet processing, surface-air heat exchanger. Setting a new air intakes in the system, a return air as the air before the air heater in a heater； set before cooling dehumidification air heater, known as the secondary air heater； set in air-conditioned

10、 room before sending outlet air heater, known as the three air heaters. Three air-conditioned room heater to regulate the main role of the temperature, the thermal coal used for the hot water or electric heating. The surface heat exchanger in cold water or a refrigerant through the low-temperature w

11、ater-cooled surface, called the direct evaporative cooler or cooler surface, but also by spraying cold water or hot water washer, There are also direct water spray of steam approach to achieve the air hot and wet processing. (4) The section of air transportation and distribution and control Fans and

12、 air conditioning systems to send, return air pipe as part of air transport. Duct in the regulation of air valve, butterfly valve, damper, boot valve and air outlet such as points, control section. Air-conditioning system according to the different air resistance, set the number of fans are differen

13、t, if the air conditioning system for a wind turbine set, the fans not only from the air role, the role was underway as a single return air fan system； if the air conditioning system set two fans, one for the blower, another fan for the back, then called the two-fan system. (5). cold and heat source

14、 of air conditioning system, Air conditioning systems used in the cold cold source is generally divided into natural and artificial sources of cold source. Natural cooling source generally refers to ground water from deep wells, artificial cold source generally refers to the use of artificial refrig

15、eration means available, which includes the vapor compression refrigeration, absorption refrigeration, and steam jet refrigeration, and other means. Modern large-scale buildings are often used for central air conditioning system Its working principle is when the ambient temperature is too high, the air conditioning system, through re-circulated to the indoor heat away so that the indoor