MEASUREMENT METHOD OF HEAT TRANSFER SPECIFIC RESISTANCE THROUGH INVESTIGATED OBJECT (VERSIONS), AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: heating.;SUBSTANCE: device includes heat exchanger (1), two contact temperature measuring devices (4, 5), heating (9), accumulating (11) and drain (12) tanks; inlet (2), outlet (3), connection (10), drain (19) and return (22) pipelines. Heat exchanger (1) has the possibility of spatial movement relative to the investigated object (8). External surface of heat exchanger (1), excluding the section facing internal surface (7) of investigated object (8), is equipped with heat insulation (6). The first contact temperature measuring device (4) is arranged on external surface of heat exchanger (1), which faces internal surface (7) of investigated object (8). The second contact temperature measuring device (5) is arranged on external (17) or side (18) surfaces of investigated object (8). Heat exchanger (1) is connected through connection pipeline (10) to heating tank (9), and through outlet pipeline (3) to drain tank (12). Heating tank (9) is connected through inlet pipeline (2) to accumulating tank (11). Accumulating tank (11) is connected through drain (19) and return (22) pipelines to drain tank (12). Connection pipeline (10) is equipped with heat carrier flow rate measuring device (13) and valve (14). Return pipeline (22) is equipped with valve (24) and pump (23). Before heat carrier reaches the operating temperature, heat exchanger is located at some distance from internal surface of the investigated object, which excludes heat contact between them. When heat carrier reaches the operating temperature, heat contact is provided between the heat exchanger and internal surface of the investigated object. Temperature of heated section of internal surface of the investigated object is measured. Time interval is measured between the beginning of internal surface section heating and the beginning of temperature increase at the specified point on external (or side) surface of the investigated object. Relationship between the overheating value of external (or side) surface of the investigated object and time is recorded. Relationship between duration of the first heating stage and overheating value of external (or side) surface of the investigated object is obtained. Values of heat transfer specific resistance through the investigated object are calculated for various time moments. Constant value of heat transfer specific resistance through the investigated object is defined or its average value is calculated.;EFFECT: improving consumer properties due to enlarging application field and improving measurement accuracy.;10 cl, 4 dwg