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Browsing by Author "Goldberg, Louise F."

Now showing 1 - 3 of 3
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    Development of a Solar Smoleniec/Stirling Hybrid Thermo-Mechanical Generator
    (2010) Goldberg, Louise F.
    The Thermo-Mechanical Generator was invented in 1967 and is an ingeniously simple and elegant heat engine operating on a Stirling thermodynamic cycle that can yield cogenerated electrical and thermal energy from moderately hot heat sources (200-500°C). A new version of this heat engine has been invented that is capable of operating off concentrated solar energy provided by inexpensive, acrylic Fresnel lenses. A key innovation in the technology is the use of a digital thermodynamic Smoleniec/Stirling cycle to optimize the performance of the heat engine in real time. A state space analysis of the engine has been completed that demonstrates that the invention can operate successfully. So far, the analysis has predicted an output electrical power of 1.9 kW when operating between hot and cold temperature limits of 500 C and 20 C respectively. Under these conditions the engine operates at a frequency of 87 Hz.
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    Two Years of Transient Cold-Climate Building Foundation Hygrothermal Experimental Data
    (2015-05-21) Goldberg, Louise F.; Harmon, Anna C.; goldb001@umn.edu; Goldberg, Louise F.
    The data consist of two years of continuous transient experimental measurements on the hygrothermal performance of concrete masonry block walls in a full basement in a cold climate (US DOE climate zone 7). The walls were insulated in compliance with the thermal requirements of the 2012 International Energy Conservation Code and in compliance with the durability performance requirements of the 2009 MN Building Code. These data are useful for verifying the physical validity of cold-climate foundation insulation system building code requirements; understanding the physics of heat and moisture transport in foundation walls from an experimental perspective; and, validating the predictions of thermal and hygrothermal building foundation simulation programs. The data are in the public domain and can be released now since the peer-review process has been completed.