MEASUREMENT METHOD OF HEAT TRANSFER SPECIFIC RESISTANCE THROUGH OBJECT (VERSIONS), AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC G01N25/18 

FIELD: heating.

SUBSTANCE: device includes heat exchanger (1) being in heat contact with internal surface of investigated object (8), two contact temperature measuring devices (4, 5), heating (9), accumulating (11) and drain (12) tanks; inlet (2), outlet (3), connection (10), drain (13) and overflow (26) pipelines. External surface of heat exchanger, excluding the section adjacent to internal surface (7) of investigated object, is equipped with heat insulation (6). The first contact temperature measuring device (4) is arranged between internal surface (7) of investigated object (8) and external surface of heat exchanger (1). The second contact temperature measuring device (5) is arranged on external (22) or side (23) 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), and through drain pipeline (13) to drain tank (12). Accumulating tank (11) is connected through overflow pipeline (26) to drain tank (12). Connection (10), inlet (2) and drain (13) pipelines are equipped with valves (14, 16, 18) and heat carrier flow rate measuring devices (15, 17, 19). In order to carry out measurements, heat carrier is passed by the heat exchanger. When heat carrier reaches the operating temperature, a section of the internal surface of the investigated object is heated with heat exchanger. 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 object is calculated for various time moments. Constant value of heat transfer specific resistance through the 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