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Low Data Rate Digital Transmission Techniques for Alaskan Applications
Thomas Roberts, Robert Merritt, and Kenneth Kokjer
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Air-to-Air Heat Recovery Devices for Small Buildings
John P. Zarling
With the escalation of fuel costs, many people are turning to tighter, better insulated buildings as a means of achieving energy conservation. This is especially true in northern climates, where heating seasons are long and severe. Installing efficient well sealed vapor barriers and weather stripping and caulking around doors and windows reduces cold air infiltration but can lead to damaging moisture buildup, as well as unpleasant and even unhealthy accumulations of odors and gases. To provide the necessary ventilation air to maintain air quality in homes while holding down energy costs, air-to-air heat exchangers have been proposed for residential and other simple structures normally not served by an active or forced ventilation system. Four basic types of air-to-air heat exchangers are suited for small scale use: rotary, coil-loop, heat pipe, and plate. The operating principles of each of these units are presented and their individual advantages and disadvantages are discusses. A test program has been initiated to evaluate the performance of a few commercial units as well as several units designed and/or built at the University of Alaska. Preliminary results from several of these tests are presented along with a critique on their design.
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Solar Assisted Culvert Thawing Device Phase I
John P. Zarling
A solar assisted culvert thawing device has been designed, constructed, and installed as an alternate method for the prevention and control of roadway flooding and icing. The proposed solar thawing device is a maintenance-free system and relieves the labor-intensive and expensive culvert thawing methods presently used
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A Thermal Performance Design Optimization Study for Small Alaskan Rural Schools
John Zarling and James S. Strandberg
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Passive Solar Heating in Alaska
John Zarling
The relationship between the four elements of passive solar design for small buildings; south facing windows, thermal mass, thermal insulating shutters, and insulation thickness, were studied by computer simulation to determine their long-term effects on energy consumption. Solar and weather data for Fairbanks, Alaska, 65(degrees)N latitude, was the input to the TRNSYS Program used to perform the dynamic simulations. Results for an entire heating season are presented. Overall it is shown that shutters and insulation are the most important elements in the design of energy conserving structures for the north. Thermal mass plays a lesser role, especially during the mid-winter months when direct solar gain is balanced by the building envelope losses.
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