Air temperature and humidity automatic control system and method for cloud chamber

Abstract

The invention discloses an air temperature and humidity automatic control system and method for a cloud chamber. The method is characterized in that air to enter the cloud chamber is divided into two parts; one part of the air is dried to form dry air; the other part of the air is humidified to form moist air; the temperature and the humidity of the dry air and the temperature and the humidity of the moist air are monitored; and according to required and preset air temperature and humidity, the dry air and the moist air are proportionally mixed and then are pumped into the cloud chamber. The system and the method may provide air with specific humidity for cloud physics and manual influence weather research atmosphere ice nucleus or ice crystal equipment.

Description

technical field [0001] The invention relates to the field of atmospheric science, in particular to a device for providing specific humidity and supersaturation for cloud physics and artificial weather modification equipment for studying atmospheric ice nuclei or ice crystals. Background technique [0002] In the absence of atmospheric ice nuclei, pure water droplets need to form ice crystals at very low temperatures (below -40°C), while in the presence of atmospheric ice nuclei, water vapor can form ice crystals at higher temperatures. Therefore, the atmospheric ice core has an important impact on clouds, precipitation and climate effects, and is a basic research direction of cloud physics and weather modification research. At present, the basic equipment for studying the formation of ice crystals from ice nuclei is the cloud chamber. In 1964, a large-scale ice core observation and research project was carried out abroad, and my country's ice core research was also carried ...

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Problems solved by technology

[0003] Among these cloud chambers, some cloud chambers control the temperature, humidity and supersaturation of water vapor, or use fixed measurement values ​​(for example, patents for cloud chambers and cloud chamber systems used for counting activation of atmospheric ice ice nuclei), cloud chambers Under the condition of absolute vacuum and low temperature, when the temperature and pressure in the water tank are controlled to be extremely low, open the valve connecting the water tank and the cloud chamber, so that the water vapor enters the cloud chamber, so as to calculate the given ice surface supersaturation value, but The ice surface supersaturation cannot be precisely controlled by the preset value, and only the actual value can be accurately measured; other domestic existing cloud chambers use the absolute ice surface supersaturation (for example, a mobile hybrid cloud chamber that can continuously provide supercooled fog) , that is, too much water vapor is introduced to ensure that the cloud chamber environment is at the supersaturation value of the ice surface, and the supersaturation is ignored or not measured

For the former cloud chamber method of obtaining a specific ice surface supersaturation by controlling temperature and humidity, although the ice surface supersaturation can be accurately measured, and the process of forming ice crystals from ice nuclei with accurate temperature, humidity and supersaturation can be obtained, the active design Experiments with specific temperature, humidity and supersaturation are not easy to carry out; while the latter cloud chamber ignores the value of supersaturation and uses empirical operations, which brings difficulties to the repeatability and comparability of experiments

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