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Error analysis of thermal response tests
Applied Energy, 2013Abstract The ground thermal conductivity and borehole thermal resistance are essential parameters for the design of a ground source heat pump system. As it is hardly possible to obtain sufficiently accurate values of these parameters from geological or soil-profile information, thermal response tests have been developed that provide measurements in ...
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Errors of thermal-energy measurements
Measurement Techniques, 2000It is shown that systematic errors play a significant role in thermal-energy measurements while random errors are negligible. Algebraic summation of the error components is recommended for evaluation of the errors of heat meters; quadratic summation is recommended for evaluation of thermal-energy errors.
Zh. F. Kudryashova, V. I. Mishustin
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Machine Tool Thermal Error Reduction—an Appraisal
Proceedings of the I MECH E Part B Journal of Engineering Manufacture, 1999It has been shown that machine tool thermal distortion can account for 75 per cent of the total machining error. As a result there has been a great deal of interest in techniques for reducing thermal errors. The approaches taken to thermal error reduction can be divided into two broad categories of reducing structural temperature change and reducing ...
S R Postlethwaite, J P Allen, D G Ford
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The International Journal of Advanced Manufacturing Technology, 2002
Thermally induced errors have been significant factors affecting machine tool accuracy. In this paper, the thermal spindle error and thermal feed axis error have been considered, and a measurement/compensation system for thermal error is introduced. Several modelling techniques for thermal errors are also implemented for the thermal error prediction; i.
H. Pahk, S.W. Lee
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Thermally induced errors have been significant factors affecting machine tool accuracy. In this paper, the thermal spindle error and thermal feed axis error have been considered, and a measurement/compensation system for thermal error is introduced. Several modelling techniques for thermal errors are also implemented for the thermal error prediction; i.
H. Pahk, S.W. Lee
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Errors in Thermal Measurements
Nature, 1932PROF. PARTINGTON directs attention1 to errors which are likely to be present when resistance thermometers are used in measurements of heats of adsorption. He does not refer to thermocouple thermometers directly, but he includes in his references papers which describe their use.
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Thermal error of a hydrostatic spindle
Precision Engineering, 2011This paper proposes a thermo-mechanical error model of a hydrostatic spindle for a high precision machine tool. By predicting the variation of motion error induced by thermal effects on a machine worktable during machining, this model allows deeper insights into the underlying mechanisms that result in evolutions of the spindle accuracy. The heat power
Dongju Chen +3 more
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