It can now be used to analyze multiple-story buildings, instead of just a single-story building. The recently upgraded Back-of-the-Envelope Calculator is more versatile as well. Not only can you see real-time energy connections, but you can calculate total CO 2 emissions for a building from both electricity and gas consumption. Psych: An Open Source Psychrometric Plug-in for Microsoft Excel by Kevin Brown Features Minute-by-minute psychrometric calculations Open Source/Public Domain Find Wet Bulb depression, absolute humidity, Enthalpy (measure of internal energy), water vapor pressure, specific volume, moist air density Description Psych is an Excel-Plugin or function that will calculate properties of moist air. Services There are two packages available: The Basic package is free and doesn't require registration. The calculator is available for free download and lets you see real-time energy connections among building components, isolate the effects of a change to a single energy parameter or produce concept-level energy estimates. Formulations for the thermodynamic properties of dry air from 173.15 K to 473.15 K, and of saturated moist air from 173.15 K to 372.15 K, at pressures to 5 MPa, R.
When it comes to understanding energy efficiency opportunities, it’s useful to see how changing one component affects the whole.Įnergy engineers at the Energy Center of Wisconsin developed the Back-of-the-Envelope Calculator to provide greater initial insight into the energy usage and environmental impacts of a proposed commercial building project. Free tool shows energy interactions in buildingsĮnergy consumption in buildings is a complicated set of interactions among building components.
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