International Steam Tables vs Mechanical Engineering Toolkit

The "International Steam Tables - IAPWS-IF97" app has been developed by active members of the International Association for the Properties of Water and Steam (IAPWS) at the Zittau/Görlitz University of Applied Sciences. The research group at the Department of Technical Thermodynamics in Zittau participated in the development of the "Industrial Formulation IAPWS-IF97 for the Properties of Water and Steam" and developed four supplementary standards for backward equations. This universal app can be used on iPhone, iPad, and iPod touch, and is designed for comfortable use. The calculations of the thermodynamic properties are based on the Industrial Formulation IAPWS-IF97 and cover its full range of validity. In addition, transport properties, thermodynamic derivatives, and backward functions can be calculated. This app is intended to be used by students and engineers in their daily work. To learn more about the "International Steam Tables - IAPWS-IF97" app visit our website www.thermodynamics-zittau.de for a detailed User's Guide. --------------------------------------- Features of the "International Steam Tables - IAPWS-IF97" app: The following combinations of input variables can be chosen: Pressure p and temperature t Pressure p and vapor fraction x in wet steam region Temperature t and vapor fraction x in wet steam region Pressure p and specific enthalpy h Pressure p and specific entropy s Specific enthalpy h and specific entropy s Specific internal energy u and specific volume v Specific enthalpy h and specific volume v The user just edits the values of the input variables and all results are calculated automatically. See the screenshots below this text for details. Depending on the given pair of input variables the following properties will be calculated: Pressure p or saturation pressure ps Temperature t or saturation temperature ts Vapor fraction x Specific volume v Density rho Specific internal energy u Specific enthalpy h Specific entropy s Specific isobaric heat capacity cp Specific isochoric heat capacity cv Isentropic exponent kappa Speed of sound w Isobaric cubic expansion coefficient alpha_v Isothermal compressibility kappa_t Thermal conductivity lambda Dynamic viscosity eta Kinematic viscosity ny Prandtl number Pr Thermal diffusivity a The calculated properties are displayed in a scrollable view. The user just needs to scroll down to see all the results. See the screenshots below for details. If the user switches from one input variable combination to another the previously given or calculated values will be assigned to the new input values and the output is being calculated automatically. For example, if the user calculates a certain state point from pressure p and temperature t and switches to a calculation from pressure p and specific entropy s afterwards, the previously calculated value for s (from p and t) will be assigned as input value for s. This eases the calculation of thermodynamic processes in which one property is kept constant, e. g. of an isentropic expansion. The user can choose SI or I-P unit systems. In addition a variety of other units are available, e.g. K, °C, °F, °R for Temperature, MPa, bar, psi, atm for pressure, kg, lb for mass, kJ, Btu, ft lbf, kcal for energy. All units can be selected independently but the user might also switch between SI and IP unit system for all properties with just one tap. See the screenshots below this text for details. Unit conversions will be effective immediately. A detailed User's Guide explains the features and capabilities of this App. View the User's guide online on www.thermodynamics-zittau.de.

Mechanical Engineering Toolkit is a professional engineering calculator for students, researchers, and practicing engineers. Choose a formula, enter your variables, and get instant results — with calculation steps, formulas, diagrams, and unit conversions shown along the way. Switch between SI and Imperial units anytime, save favorites, and find the right tool fast with recommendations by major. Save your inputs as named projects, and export any result as text, image, CSV or PDF. Categories and tools: Mechanics of Material • Moments of inertia of plane areas • Force-displacement relation of a bar • Torsion formula and angle of twist • Flexure formula of a beam • Transverse shear stress • Deflections and slopes of cantilever and simple beams • Plane stress transformation and Mohr's circle • Principal stresses and planes • Spherical shell and thin-walled pressure vessel stresses • Buckling load of a column • Thermal deformation and stress • Combined loading • Bolted / riveted joints • Fatigue safety factor • Shaft power and torque Statics • Centroid of an area • Resultant of a force system • Beam reactions • 2D truss analysis Machine Design • Helical compression springs • Spur gear geometry and stresses • Shaft fatigue design (DE-Goodman) • Bearing L10 life • Belt and chain drives • Bolt preload / torque-tension • Fillet weld strength • Press / shrink-fit interference • Shaft critical speed (Dunkerley) • Beam natural frequency (five end conditions) • Torsional natural frequency (one or two rotors) Fluids & Thermal • Reynolds number and flow regime • Pipe pressure drop (Darcy-Weisbach with Colebrook) • Pump and fan power • Composite wall conduction • Fin efficiency • Heat exchanger sizing by LMTD Theory of Elasticity • Constitutive relation of linear elastic material • Stress/strain of linear elastic material Composite Material • Lamina and laminate stress/strain • Lamina engineering constants • Laminate plane and 3D properties • Rule of mixtures • Failure criteria (Tsai-Hill, Tsai-Wu) Reference Tables • Drill & tap chart (metric and imperial thread series) • ISO 286 fits & tolerances • Standard sections (AISC W, IPE, HEB) • Unit converter No account required. Works offline. Available in English, Chinese, German, French, and Japanese.