Operating ambient temperature, i.e. the temperature of the air to the human body tube. The working ambient temperature is also the fan inlet temperature. The correct choice of the working environment temperature has an important influence on the heat transfer calculation of the air cooler, the selection of the heat transfer area and the evaluation of economic efficiency, especially the heat transfer coefficient of the low-altitude heat flow (the difference between the medium temperature of the heat flow in the pipeline and the temperature of the working environment is relatively small) of the heat transfer. According to the local summer, the average dry temperature is not guaranteed for 5 days per year. Such as: petroleum, petrochemical, chemical and other large industrial installations, when the tube of the heat flow medium, and the heat flow outlet requirements are more stringent, basically use this method. When the temperature changes, generally need air flow regulator to control or adjust the system operation. In some energy-saving low-temperature energy recovery system or low-temperature heat transfer process, the air cooler area is often larger, and equipment investment has become the main equipment feasibility of conflict. In this kind of equipment , the heat flow load of the air-cooled radiator can change with the season , so it is more reasonable to take the annual average temperature as the design temperature . Calculated according to the local average temperature of the hottest monthly. If the outlet temperature of the air cooler is allowed to change within a certain range, or control is not too strict, for example: the air cooler is equipped with a back-end cooling (water cooler, refrigeration unit, etc.). The design of the air cooler is also used in the application of the monthly maximum temperature example. In most areas of China, the average dry temperature of 5 days each summer can not be guaranteed below 35 ℃. The local annual average temperature as a benchmark. In close proximity to the ambient temperature temperature is greater than 15 ~ 20 ℃, the use of air-cooled radiator is more reasonable .
