Thermal Conductivity Of Soil And Rock Classification Manual

Thermal conductivity of soil is defined as the amount of heat passing in unit time through a unit cross-sectional area of soil under a unit temperature gradient in the direction of heat flow. It is measured in watt per meter per kelvin (W/mk) or also in British thermal unit per foot hour per Fahrenheit (BTU/ft.hr. °F). Knowing thermal conductivity of ground is very important for many geotechnical works. During construction of foundation in permafrost ground, to design underground power line design, for stabilizing ground by freezing, and for utilizing geothermal energy by geothermal heat system we require knowledge of ground thermal conductivity. Thermal properties of ground are difficult to measure exactly. Here estimation of thermal conductivity (k) by different approach is summarized. There are various methods for measuring this parameter including empirical formulas, laboratory tests, and in-situ tests. Empirical Formula and Soil Classification Soil and rock classification manual (Salomone et al. 1989) published by international ground source heat pump association categorizes soil/rock into different groups and typical values to each group are given. Also, many empirical formulas based on the soil properties (water content, saturation, porosity) are available for the estimation of k with the accuracy of  ±25% in Farouki (1986). Lab Experiments: Guarded Hot Plate (GHP) Test: Guarded hot plate (GHP) test apparatus and test procedure (single and double sided) areShow MoreRelatedBuilding Construction8401 Words   |  34 Pagesconstruction †¢ Configuration – refers to a buildings general shape or layout †¢ Access exposures – Stefan-Boltzmann law states that the intensity of thermal radiation is a function of the fourth power of the absolute temperature of the thermal radiation source. Every time the distance from a heat source is doubled, the thermal radiation level is reduced 4 times. Chapter 2: Design Principles â€Å"Form follows function†Ã¢â‚¬ ¦The building’s design must facilitate its end use. AestheticsRead MoreSexually Transmitted Diseases35655 Words   |  143 Pagesbiomolecules of life 72-76 Unit 4 Energy in the Community Electricity 77-78 Heat 78-81 Light 82-91 Sound 92 Simple Machines 93-99 Unit 5 The Physical Environment Weather and Climate 100-113 Soils 114-128 Unit 6 Living things in the Environment Plant and animal cells 129 Eukaryotes vs prokaryotes 130 Structures and functions 133-137 Microbes 148-150 Onion and cheek cells 150-151 Ecological study 154 Read MoreProject Mgmt296381 Words   |  1186 Pagesupdating the Test Bank and Online Quizzes; Charlie Cook, University of West Alabama for revising the PowerPoint slides; Oliver F. Lehmann for providing access to PMBOK study questions; and Mink for accuracy checking the text and Instructor’s Resource Manual content. Next, it is important to note that the text includes contributions from numerous students, colleagues, friends, and managers gleaned from professional conversations. We want them to know we sincerely appreciate their counsel and suggestions