Mathematical modeling and research of a thermoelectric system for extracting foreign object from the human body by freezing
DOI: 10.17586/1606-4313-2021-20-1-94-101
UDC 621.362
Tagir A. Ismailov, Evdulov О. V., Nasrulaev Abdula M.
Keywords: extraction of foreign objects, freezing, thermoelectric system, mathematical modeling, thermophysical processes, numerical experiment
UDC 621.362
Mathematical modeling and research of a thermoelectric system for extracting foreign object from the human body by freezing
For citation: Ismailov T.A., Yevdulov O.V., Nasrulaev A.M. Mathematical modeling and research of a thermoelectric system for extracting foreign object from the human body by freezing. Journal of International Academy of Refrigeration. 2021. No 1. p. 94-101. DOI: 10.17586/1606-4313-2021-20-1-94-101
Abstract
The article is devoted to mathematical modeling and research of a thermoelectric system (TES) for extracting foreign objects from the human body by freezing. The object of research is a structure containing a special tube for insertion into the body cavity, a movable probe with guides that can move along the tube, and a thermoelectric module (TEM) placed on the end surface of the probe, on the opposite surface of which there is a wet tube. When performing the operation for extraction of foreign object (FO) from the body, the tube is inserted into the body cavity using the probe TEM cold surface through the sponge is in contact with the object is their grip by freezing up, then retrieves FO object by moving the probe in the reverse direction. The TPP model is considered. It is implemented on the basis of solving the problem of thermal conductivity, including taking into account the phase transition of a substance, the thermophysical characteristics of a biological object, FO, cooling TEM. As a result of the numerical experiment, we obtained graphs of temperature changes at various points of the TES when it is introduced into the human body to extract FO, depending on the power of the TES, the parameters of the module materials, external conditions, and determined the duration of icing of a wet sponge for various values of the TEM cooling capacity. It is determined that the device can use a standard TEM with a cooling capacity from 4500 W/m2 to 7000 W/m2. It is indicated that the selection of TEM parameters should be guided by restrictions on the operation of the device, as well as medical norms and standards in order to avoid the process of frostbite of adjacent tissues.
Abstract
The article is devoted to mathematical modeling and research of a thermoelectric system (TES) for extracting foreign objects from the human body by freezing. The object of research is a structure containing a special tube for insertion into the body cavity, a movable probe with guides that can move along the tube, and a thermoelectric module (TEM) placed on the end surface of the probe, on the opposite surface of which there is a wet tube. When performing the operation for extraction of foreign object (FO) from the body, the tube is inserted into the body cavity using the probe TEM cold surface through the sponge is in contact with the object is their grip by freezing up, then retrieves FO object by moving the probe in the reverse direction. The TPP model is considered. It is implemented on the basis of solving the problem of thermal conductivity, including taking into account the phase transition of a substance, the thermophysical characteristics of a biological object, FO, cooling TEM. As a result of the numerical experiment, we obtained graphs of temperature changes at various points of the TES when it is introduced into the human body to extract FO, depending on the power of the TES, the parameters of the module materials, external conditions, and determined the duration of icing of a wet sponge for various values of the TEM cooling capacity. It is determined that the device can use a standard TEM with a cooling capacity from 4500 W/m2 to 7000 W/m2. It is indicated that the selection of TEM parameters should be guided by restrictions on the operation of the device, as well as medical norms and standards in order to avoid the process of frostbite of adjacent tissues.
Keywords: extraction of foreign objects, freezing, thermoelectric system, mathematical modeling, thermophysical processes, numerical experiment
Русский
English
