Guidelines For Thermography In Architecture And Civil Engineering

What does it take to obtain significant measurement results in thermographic examinations? These guidelines convey in condensed form the authors' many years of experience in detecting thermal engineering defects and structural damage such as thermal bridges, air leaks or moisture penetration damage with a non-destructive and easily applicable method of measurement and investigation. As well as providing an introduction to the physical fundamentals of thermography, the book offers an up-to-date overview of the technology, structure, standards and selection criteria of common thermographic systems. Using selected examples, it shows the many possibilities and areas of application of infrared thermography as well as the limits of its use.

This is a rich handbook, in English language, about thermography applied to sector of building, that approaches the technique both from a theoric and practical point of view. Thermography is explained with a lot of thermal images as examples for physical consequences of formulae, and case histories of several kind of inspections are developed, from dampness and moisture and mold, to thermal bypass, to water infiltrations, to façade delamination, to building energy efficiency and construction defects. Every source of errors in measuring surface temperature with thermography is described in detail with rich examples, so that book is unvaluable for the beginner but interesting too for the skilled. Both European (EN) that USA (ASTM) technical standards are described in detail, with guidelines for evaluation of gravity for thermal insulation weakness in buildings. A chapter is dedicated to describing technical characteristics of thermal cameras and software, so the beginner may understand data sheets before buying a thermal imaging system. Two chapters are dedicated to blower door test and his synergy with thermography, with explanation of standards and case histories. The last chapter treats of heat flux meter and measuring of thermal transmittance in situ, making the book a complete text for nondestructive energy efficiency tests for building.Davide Lanzoni, engineer, level 3 in thermography, is owner of SAIGE (www.saige.it), and perform both thermographic inspections in building and electrical, and training courses for certification in level 1 and level 2.

Infrared thermography (IRT) is a non-contact, non-invasive methodology which allows for detection of thermal energy that is radiated from objects in the infrared band of the electromagnetic spectrum, for conversion of such energy into a visible image (such as a surface temperature map). This feature represents a great potential to be exploited in a vast variety of fields from aerospace to civil engineering, to medicine, to agriculture, etc. However, IRT is still not adequately enclosed in industrial instrumentation and there are still potential users who might benefit from the use of such a technique and who are not aware of their existence. This e-book conveys information about basic IRT theory, infrared detectors, signal digitalization and applications of infrared thermography in many fields such as medicine, foodstuff conservation, fluid-dynamics, architecture, anthropology, condition monitoring, non destructive testing and evaluation of materials and structures. The volume promotes an exchange of information between the academic world and industry, and shares methodologies which were independently developed and applied in specific disciplines.

Based on the findings of a comprehensive survey of underpinning practice, the report gives guidance on: how to determine that a foundation problem exists and the need for underpinning; how to recognise the circumstances in which underpinning is appropriate; how to conduct a site investigation; the scope and depth of underpinning; and how to choose which type of underpinning to adopt.

The volume is a theoretical and practical manual for thermographic inspections in electrical and industrial field. It contains 230 pages of theory and practical informations about guidelines, criteria, applications in electrical and industrial surveys.In the early chapters the book provides the physical basis of thermography, the technical characteristics of the cameras and their meanings, and the basic measurement techniques (emissivity, reflected ambient temperature, transimissivity).We then move on to the examination of the main applications in the electrical and industrial, where thermography is covering an increasingly important as a technique of predictive maintenance. Through it possible investigations into the electrical connections, phase imbalances, overloads, loss of isolation and physical damage to the conductors, the normal plants in the low voltage transformer substations.Are also possible investigations on electric motors, where you can find not only the loss of insulation in the windings but also imbalances and other mechanical problems.Other applications, of growing interesting, concern photovoltaic systems and data centers.In other industries we examine the applications in the chemical and petrochemical industries, and in general in industrial process control.The book contains many pictures of real cases and references to foreign technical standards, with criteria for classifying the severity of thermal anomalies and mathematical examples of application: in the US thermography technique has been recognized as valid by the NFPA (National Fire Protection Agency) for preventing fires of electrical origin, and the major insurance companies promote the application of thermography surveys.Other chapter covers miscellaneous applications such detecting corrosion under insulation, faults in steam traps, measuring furnace tubes, gas leak detection, refractory damage, checking level in vessels, temperature control in moulds, inspecting fiberglass and wooden boats for osmosis and humidity.