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Qalculate! supports common mathematical functions and operations, multiple bases, autocompletion, complex numbers, infinite numbers, arrays and matrices, variables, mathematical and physical constants, user-defined functions, symbolic derivation and integration, solving of equations involving unknowns, uncertainty propagation using interval arithmetic, plotting using Gnuplot, unit and currency ...
Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units. In most countries, U-value is expressed in SI units, as watts per square metre-kelvin: W/(m 2 ⋅K) In the United States, U-value is expressed as British thermal units (Btu) per hour-square feet-degrees Fahrenheit: Btu/(h⋅ft 2 ⋅°F)
List of structural engineering software; Power engineering software - software for power stations, overhead power lines, transmission towers, electrical grids, grounding, electrical substations, and Lightning; List of discrete event simulation software - Discrete-event simulation; List of computer algebra systems - Computer algebra system
The certifying agency provides details on model inputs, software specifications, and performance requirements. The following is a list of U.S. based energy codes and standards that reference building simulations to demonstrate compliance: ASHRAE 90.1; International Energy Conservation Code (IECC) Leadership in Energy and Environmental Design (LEED)
List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE. The following table is split into two groups based on whether it has a graphical visual interface or not.
Architects and engineers call the resulting values either the U-Value or the R-Value of a construction assembly like a wall. Each type of value (R or U) are related as the inverse of each other such that R-Value = 1/U-Value and both are more fully understood through the concept of an overall heat transfer coefficient described in lower section ...
The list included: ABB, AEP, CEA, CRIEPI, EDF, EPRI, Hydro-Québec, Ontario Hydro, US Bureau of Reclamation, Western Area Power Administration. EPRI joined the DCG in 1983. In 1984 BPA left the DCG and W. Scott Meyer continued independently and personally developing with the existing EMTP code under the new name EMTP-ATP in his free time.
The U-value is used to refer to the amount of heat that can pass through a window, called thermal transmittance, with a lower score being better. [1] The U-factor of a window can often be found on the rating label of the window. Although the concept of U-value (or U-factor) is universal, U-values can be expressed in different units.