The cooling loss of air separation equipment depends on the heat transferred from the surrounding environment of the device. The magnitude of cold running loss is related to the following factors.
(1) Thermal insulation and cold insulation measures
In the cold insulation box, insulation materials with poor thermal conductivity are filled to reduce heat transfer from the outside. The cold insulation condition is not only related to factors such as the performance of the insulation material, the thickness of the filling layer, and the insulation measures of the support, but also to the filling situation. The greater impact is whether the cold insulation material remains dry. Damping of cold insulation materials will greatly reduce insulation performance and increase cooling loss. To ensure the sealing of the cold box, a small amount of dry gas should be filled to maintain a slight positive pressure.
(2) Operating environmental conditions
The heat transfer is directly proportional to the temperature difference in heat transfer. If the temperature of the surrounding air increases, the temperature difference with the inside of the device will expand, and the cooling loss will increase. Therefore, the loss of running cold is greater in summer than in winter, and greater during the day than at night.
(3) Type and capacity of air separation equipment
Because the heat transfer is directly proportional to the heat transfer area, and the surface area of the cold insulation box is not directly proportional to the capacity of the device, as the device capacity increases, the cooling loss per cubic meter of processing air (unit cooling loss) decreases. For some old air separation units that use tubular cold storage, oxygen concentrators with the same capacity have more equipment in the cold insulation box, which has a relatively larger surface area and greater cooling loss.
DEAR Air Separation has strong research and development capabilities. The company has established the Deer Air Separation Technology Design and Research Institute, which is an innovative and talented organizational structure with an average age of 35 years. It has a team of design and development, process, and experimental engineering and technical talents, with the vice general manager of the company personally serving as the dean of the design institute.
