Refrigeration of a Pipe Pile by Air Circulation

摘要

The data obtained from this investigation indicate that the circulation of cold ambient air through pipe piles can be effective in lowering the temperature of frozen and unfrozen soil. The system created a concentrated cooling effect immediately adjacent to the pile during exhaust fan operation. This concentration could effectively produce the desired heat removal for freeze-back of hollow piles installed in preaugered holes backfilled with slurry, site conditions, the test installation, and the test procedure are described, and the temperature data are given. Using this system in a pile foundation would provide an efficient and economical method of assisting the freezeback of piles during the winter months. The advantages over commonly used brine or oil circulants include the following: Air circulation is relatively inexpensive, no recirculation is required, and no heat exchanger is needed to remove heat from the circulant. (Author)