Operation characteristics of high-precision constant temperature and humidity laboratory
Release time:
2020-06-02
The high-precision constant temperature and humidity laboratory adopts a direct evaporative independent constant temperature and humidity air conditioning system, which has the advantages of simple system, easy adjustment, convenient operation and management, and energy saving. In the engineering design, the system should be reasonably selected according to the temperature and humidity accuracy requirements of the laboratory, and the load calculation of the room should be as detailed as possible to select a matching constant temperature and humidity unit.
The high-precision constant temperature and humidity laboratory adopts a direct evaporative independent constant temperature and humidity air conditioning system, which has the advantages of simple system, easy adjustment, convenient operation and management, and energy saving. In the engineering design, the system should be reasonably selected according to the temperature and humidity accuracy requirements of the laboratory, and the load calculation of the room should be as detailed as possible to select a matching constant temperature and humidity unit.
In order to meet the requirements of indoor constant temperature and humidity accuracy, the ventilation frequency of the constant temperature and humidity air-conditioned room is large. According to experience, the ventilation frequency of the constant temperature room of ±2℃ is about 10-15 times/h; the ventilation frequency of the constant temperature room of ±1℃ is about 15-20 times/h; the ventilation frequency of the constant temperature room of ±0.5℃ is about >20 times/h; the ventilation frequency of the constant temperature room of ±0.2℃ is about >30 times/h;
The airflow organization design is also one of the main factors affecting the accuracy of the constant temperature room. The following principles should be considered when designing the airflow organization in the high-precision constant temperature and humidity room: reasonable airflow organization process, give full play to the cooling or heating effect of the air supply airflow; establish a stable and uniform temperature field to ensure that when the airflow reaches the working area, the difference between its average temperature and the temperature of the working area does not exceed the allowable temperature fluctuation value; when the airflow reaches the working area, its flow speed is about 0.25m/s. ±2℃ and ±1℃ high-precision constant temperature and humidity laboratories use full-hole plates and partial-hole plates for air supply, and uniform return air at the bottom, which has a better effect.
In the construction of a constant temperature and humidity laboratory, its thermal insulation and airtightness are also very critical; a laboratory with good thermal insulation and airtightness has the advantages of saving energy, improving temperature and humidity accuracy, and reducing operating costs.
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