【 Weak current College 】 most unfavourable weather in summer time and the determination of the temperature and humidity indicators

Summary: adoption of the air conditioning system design based on the analysis set out in the summer the most adverse weather, air conditioning and humidity assessment indicators to determine why the difference between normal weather and weather-temperature and high humidity. Thus the reality of the air conditioning effects for a more correct understanding.

Keywords: summer humidity air conditioning indicators

With the rapid development of the textile technology, modern textile production enterprise on air conditioning work increasingly stringent requirements. We know, the textile industry has its own characteristics, the textile industry is on fiber, various fibers in different humidity conditions of physical characteristics and mechanical characteristics will produce a different degree of change, has a direct impact on the textile production process; if the temperature and humidity control, will cause the deterioration of production which directly affect the semi-finished product and finished product yield and quality [1], this textile enterprise of air conditioning work very high requirements. Practical work, in order to strengthen the temperature and humidity regulation work management, general formulation of air conditioning and humidity indicators. Air conditioning and humidity indicators of development is based on the workshop process needs and equipment capacity to develop, and air-conditioning indicators after the types of collaboration, joint efforts to regulate the work of meticulous adjustment should be able to complete, this will work. Therefore, developing air conditioning targets must be realistic, in line with the principle of seeking truth from facts, science, attitude, thought for production services. At the same time, the summer air temperature and humidity indicators developed to distinguish between normal indicators and indicators of a hot and humid weather. So, since the textile manufacturers of air conditioning work is soimportant, as textile production assurance system of air conditioning work, in determining the most adverse weather of summer air conditioning and humidity assessment indicators, why is the difference between normal indicators and indicators of high temperature and high humidity weather? mainly has following several aspects:

1. air conditioning design outdoor calculation parameters:
The design of the air-conditioning, outdoor design parameters is important. OK too high and will increase in equipment investment and operating costs, determine too low to meet the technological requirements. For example: under floor heating, ventilation and air conditioning design specifications ", summer air-conditioning outdoor design dry-bulb temperature of a calendar year average are not guaranteed to 50 hours of dry-bulb temperature [2]. In this way, higher than the mean and are not guaranteed within 50 hours of high temperature will not be able to meet. Check the air conditioning design manual, Zhengzhou region summer outdoor air conditioning calculations dry-bulb temperature 36.3 ℃. In addition, because the calculation parameters of air-conditioned statistical approaches and atmospheric warming effects, in some years, the Handbook established parameters than actually appear to be low. Similarly, the other parameters of the outdoors.

B, air-conditioning design indoor calculation parameters:
Air conditioning in production is a product of yield and quality of a factor, and sometimes may be an important factor, but not the only factors, product design, raw material quality, equipment, parts, cleanliness, etc are all important factors [3]. Therefore, when determining the indoor parameters must be realistic and cautious. For example, in the summer to reduce indoor air calculation parameters, would give infrastructure investment, operating costs, energy, labor protection, adversely affected. According to information of a rough analysis, such as the summer temperatures base by 20 ° c to 24 ° c, the cooling consumption savings of 20% or more, while infrastructure investment for every square metre area press 1983 air conditioning price can save more than $ 30. [3] So, determine the Interior climate characteristics calculation parameters and conditions for analysis, formulation, as correctly designed. Here's a comprehensive consideration of many factors, not just lower the temperature, improve the standard.

3. air conditioning equipment:
As the basis for calculating HVAC design, outdoor and indoor calculation parameters, and air conditioning equipment selection can only meet the design based on the parameters of conditions, from the design by the large number of blind selected devices or equipment to meet all of the outdoor weather conditions, not only is not scientific, but will result in tremendous waste.

You can see from the above analysis, system design is in accordance with the normal weather conditions as a basis to determine the device type, which determines the device, the weather conditions in normal (non-humid weather) and fully meets the requirements of the production process and, in a hot and humid weather will not be able to meet the technological requirements workshop, plus this weather-temperature freezing water called more often than the normal weather, and high temperature and high humidity weather more need to lower the temperature of the chilled water air conditioning system, so the workshop results also worse. This situation is not only technology of air conditioning, and shopping malls, hotels and other comfort air conditioning. It was only because of its design and rich content. In order for the regulation of air conditioning-work has a correct scale good measure, usually during this season will air conditioning and humidity indicator is divided into normal weather and hot and humid weather to master the case, the only way to determine the indicators is the scientific reality!

Referencedocuments:
[1] China textile textile air-conditioning with dust. [M] Beijing: zhongguofangzhichubanshe, 1998.

[2] China National nonferrous metals industry Corporation. heating, ventilation and air conditioning design specification [M] Beijing: zhongguojihuachubanshe, 1991

[3] the tenth of electronics industry Research Institute-air-conditioning Design Handbook (Second Edition) [M] Beijing: the Chinese construction industry press, 1995