13: Building and Infrastructure Thermography
- Page ID
- 146237
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\(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf q}\) \(\newcommand{\svec}{\mathbf s}\) \(\newcommand{\tvec}{\mathbf t}\) \(\newcommand{\uvec}{\mathbf u}\) \(\newcommand{\vvec}{\mathbf v}\) \(\newcommand{\wvec}{\mathbf w}\) \(\newcommand{\xvec}{\mathbf x}\) \(\newcommand{\yvec}{\mathbf y}\) \(\newcommand{\zvec}{\mathbf z}\) \(\newcommand{\rvec}{\mathbf r}\) \(\newcommand{\mvec}{\mathbf m}\) \(\newcommand{\zerovec}{\mathbf 0}\) \(\newcommand{\onevec}{\mathbf 1}\) \(\newcommand{\real}{\mathbb R}\) \(\newcommand{\twovec}[2]{\left[\begin{array}{r}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\ctwovec}[2]{\left[\begin{array}{c}#1 \\ #2 \end{array}\right]}\) \(\newcommand{\threevec}[3]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\cthreevec}[3]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \end{array}\right]}\) \(\newcommand{\fourvec}[4]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\cfourvec}[4]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \end{array}\right]}\) \(\newcommand{\fivevec}[5]{\left[\begin{array}{r}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\cfivevec}[5]{\left[\begin{array}{c}#1 \\ #2 \\ #3 \\ #4 \\ #5 \\ \end{array}\right]}\) \(\newcommand{\mattwo}[4]{\left[\begin{array}{rr}#1 \amp #2 \\ #3 \amp #4 \\ \end{array}\right]}\) \(\newcommand{\laspan}[1]{\text{Span}\{#1\}}\) \(\newcommand{\bcal}{\cal B}\) \(\newcommand{\ccal}{\cal C}\) \(\newcommand{\scal}{\cal S}\) \(\newcommand{\wcal}{\cal W}\) \(\newcommand{\ecal}{\cal E}\) \(\newcommand{\coords}[2]{\left\{#1\right\}_{#2}}\) \(\newcommand{\gray}[1]{\color{gray}{#1}}\) \(\newcommand{\lgray}[1]{\color{lightgray}{#1}}\) \(\newcommand{\rank}{\operatorname{rank}}\) \(\newcommand{\row}{\text{Row}}\) \(\newcommand{\col}{\text{Col}}\) \(\renewcommand{\row}{\text{Row}}\) \(\newcommand{\nul}{\text{Nul}}\) \(\newcommand{\var}{\text{Var}}\) \(\newcommand{\corr}{\text{corr}}\) \(\newcommand{\len}[1]{\left|#1\right|}\) \(\newcommand{\bbar}{\overline{\bvec}}\) \(\newcommand{\bhat}{\widehat{\bvec}}\) \(\newcommand{\bperp}{\bvec^\perp}\) \(\newcommand{\xhat}{\widehat{\xvec}}\) \(\newcommand{\vhat}{\widehat{\vvec}}\) \(\newcommand{\uhat}{\widehat{\uvec}}\) \(\newcommand{\what}{\widehat{\wvec}}\) \(\newcommand{\Sighat}{\widehat{\Sigma}}\) \(\newcommand{\lt}{<}\) \(\newcommand{\gt}{>}\) \(\newcommand{\amp}{&}\) \(\definecolor{fillinmathshade}{gray}{0.9}\)- 13.1: Introduction
- This page covers thermography's application in assessing the thermal efficiency of buildings, pinpointing issues such as heat loss, insulation problems, air leakage, and moisture-related concerns. It emphasizes that at Level I, thermographers concentrate on gathering accurate thermal data, detecting irregularities, and documenting their observations and limitations.
- 13.2: Heat Transfer in Buildings (Level I Review)
- This page explores heat transfer mechanisms—conduction, convection, and radiation—and their effects on building thermography. Understanding these processes is crucial for interpreting thermal patterns during inspections, ultimately offering insights into a building's thermal performance and efficiency.
- 13.3: Common Building and Infrastructure Applications
- This page discusses thermography, a versatile inspection technique for evaluating building and structural components such as envelopes, roofs, insulation, and windows. It also covers its use in inspecting solar photovoltaic systems, emphasizing that each application requires tailored conditions and methods for effective assessment.
- 13.4: Building Envelope Thermography
- This page covers the role of thermal imaging in assessing building performance, focusing on walls, insulation, air leakage, and moisture impacts. It highlights how thermal imaging helps identify insulation gaps, thermal bridges, and air leakage patterns, as well as the evolving thermal patterns related to moisture. The importance of documenting findings and the influence of environmental conditions on detecting air leakage are also emphasized.
- 13.5: Inspection Conditions and Timing for Buildings
- This page details factors influencing building thermography, including indoor-outdoor temperature differences, solar loading, wind, and time of day. It emphasizes conducting inspections in the early morning or evening while heating or cooling systems are active, and highlights the importance of documenting these conditions for accurate analysis and results.
- 13.6: Roof Thermography (Ground-Based)
- This page discusses ground-based roof thermography for detecting heat retention variations, insulation issues, and moisture effects. Optimal results are obtained after solar heating and during evening cooling. Level I technicians follow standard procedures without evaluating roof conditions or repair needs.
- 13.7: Drone-Based Roof Thermography
- This page discusses the benefits of using drones for roof inspections, such as improved safety and efficient data collection via thermography. It highlights important operational factors like stable flight, altitude, and image quality. Additionally, it notes the influence of environmental conditions on thermal readings and emphasizes the need for safety and regulatory compliance, including adherence to aviation laws and guidelines.
- 13.8: Solar Panel (PV) Thermography
- This page covers solar photovoltaic thermography, focusing on using thermal pattern recognition at Level I to detect performance issues without electrical diagnostics. It outlines common thermal patterns, inspection conditions, and highlights the advantages of drone inspections for large installations, emphasizing the importance of altitude and pixel coverage. Additionally, it discusses the necessary focus and resolution to identify small anomalies in solar modules.
- 13.9: Infrastructure Thermography
- This page discusses thermography's application in evaluating infrastructure elements like concrete structures, bridges, and pavements. It emphasizes that thermal patterns can reveal material variations, moisture presence, and environmental influences on these structures.
- 13.10: Documentation and Reporting (Level I Role)
- This page outlines the requirements for Level I documentation related to building and infrastructure inspections. Key elements to include are identification of location and components, inspection methods (ground-based or drone-based), environmental conditions, observed thermal patterns, and limitations of the inspection. It emphasizes that diagnostic conclusions or repair recommendations should not be included in the documentation.
- 13.11: Common Errors in Building and Infrastructure Thermography
- This page discusses common errors in drone inspections, highlighting issues such as inspecting in bad weather, ignoring solar effects, flying too high, achieving poor image quality, and lacking proper documentation. These mistakes can undermine the effectiveness and dependability of inspection outcomes.
- 13.12: Summary
- This page outlines the fundamentals of thermography in building inspections, focusing on how it reveals thermal performance influenced by the environment. It contrasts ground and drone inspections, with drones providing better accessibility and safety. The importance of load and irradiance for solar PV evaluations is emphasized, along with the significance of FoRD for assessments.
- 13.13: Review Questions
- This page emphasizes the importance of environmental factors in building thermography, discussing their influence on thermal readings. It showcases the advantages of drone roof inspections for safety and efficiency. The role of solar irradiance in PV thermography is highlighted for precise evaluations.