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Title	FLOOR SLAB SYSTEM HEATS 'RESERVOIR' TO WARM PLANT
Accession No	00218248
Journal Title	Engineering News-Record
Corp. Authors / Publisher	McGraw-Hill Companies, Incorporated
Publication Date	19671109
Abstract	A FLOOR SLAB ELECTRIC HEATING SYSTEM THAT EXPLOITS THE GROUND BENEATH A BUILDING AS A GIANT HEAT RESERVOIR HAS BEEN DEVELOPED BY THE SMITH-GATES CORP., FARMINGTON, CONN. THE SYSTEM STORES HEAT DURING OFF-PEAK HOURS FOR PERIODS WHEN POWER DEMANDS AND RATES ARE HIGH. THE SYSTEM, KNOWN AS DEEPHEAT, FEATURES DEEPLY EMBEDDED ELECTRICAL RESISTANCE CABLES THAT FEED HEAT FOR STORAGE INTO A SAND BLANKET AND THE NATIVE SOIL BENEATH A BUILDING. THE STORED HEAT YIELDS ITS SUPPLY IN COMPLIANCE WITH HEAT LOSS IN THE BUILDING, MAKING ITS WAY UP THROUGH THE SLAB FOR RELEASE. PREFORMED MATS OF ELECTRICAL RESISTANCE CABLE ARE USED. THERE ARE FOUR GROUPS OF TWENTY-TWO MATS WITH A SEPARATE THERMOSTAT FOR EACH GROUP. THE MATS WERE INSTALLED ON A LEVEL, STONE-FREE SAND BED, THEN WERE COVERED WITH A LAYER OF INEXPENSIVE PLASTIC SHEETING TO PROTECT THE MATS AGAINST DISTURBANCE. TESTS SHOW THAT THE TEST BUILDING REQUIRED 180,120 KWH, COSTING $1,240 COMPARED TO AN ADJACENT BUILDING OF THE SAME CONSTRUCTION BUT TWO-THIRDS THE VOLUME, COSTING $2,070 TO HEAT.
Supplemental Information	Vol 179, No 19, P 73, 2 PHOT
TRT Terms	Building ; Cables ; Concrete ; Economics ; Electric heating ; Floors ; Handling and storage ; Mats (Footings) ; Plastics ; Resistance (Electricity) ; Sand ; Slabs ; Soils ; Thermostats
Other Terms	Electrical resistance; Floors (Concrete); Mats; Plastic material; Storage
Subject Areas	H40 MAINTENANCE, GENERAL
Availability	Find a library where document is available Order Document: http://worldcat.org/issn/08919526
TRIS Files	HRIS
Database	TRIS Online

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