Test device for simulating pollutant migration and transformation in icing and melting processes of water body

A test device for simulating pollutant migration and transformation in icing and melting processes of a water body, comprising:

• a transparent cylinder body with the top open and the bottom closed, used for holding a test water body;
• a transparent box body, wherein the top of the box body is provided with a through hole through which the cylinder body is provided in the box body;
• a first refrigerating system including a first evaporator provided in the cylinder body close to an opening of the cylinder body, wherein the first refrigerating system is used for controlling the temperature of a first space from a surface of a test water body in the cylinder body to the opening of the cylinder body through the first evaporator;
• the first refrigerating system further comprises a first condenser, a first compressor, a first temperature sensor and a first temperature controller;
• the first condenser and the first compressor are connected with the first evaporator in series through pipelines, the first temperature sensor is connected with the first temperature controller, the first temperature sensor is used for detecting the temperature of the first space and sending a corresponding first temperature signal to the first temperature controller, and the first temperature controller is connected with the first compressor and used for controlling operation of the first compressor based on the first temperature signal;
• the first temperature sensor is provided at a position close to the surface of the test water body in the cylinder body;
• and
• a second refrigerating system including plurality of second evaporators, a second condenser, a second compressor, a second temperature sensor and a second temperature controller connected in series through pipelines;
• at least one of the second evaporators inside the box body, the second temperature sensor is connected with the second temperature controller, the second temperature sensor is used for detecting the internal temperature of the box body and sending a corresponding second temperature signal to the second temperature controller, and the second temperature controller is connected with the second compressor and used for controlling operation of the second compressor based on the second temperature signal, wherein the second refrigerating system is used for controlling the internal temperature of the box body;
• a circulation loop including a water pump, and two ends of the water pump are respectively connected with two opposite sides of the cylinder body through water pipes and communicated with the interior of the cylinder body.