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TECHNICAL PAPERS

Load Control Using Building Thermal Mass

[+] Author and Article Information
James E. Braun

Ray W. Herrick Laboratories, School of Mechanical Engineering, Purdue University, W. Lafayette, IN 47907e-mail: jbraun@ecn.purdue.edu

J. Sol. Energy Eng 125(3), 292-301 (Aug 04, 2003) (10 pages) doi:10.1115/1.1592184 History: Received December 01, 2002; Revised March 01, 2003; Online August 04, 2003
Copyright © 2003 by ASME
Topics: Stress
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References

Figures

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Daily energy cost savings for optimal versus night setup control: a) 12-hr on-peak period, 2-to-1 on-peak to off-peak electrical rates; b) heavy zone, flat part-load performance, 80°F mean ambient temperature (on-peak period centered at noon, clearness index=0.6, from Braun 1)
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Example daily variations in space temperatures a) and cooling quantities b) for optimal and night setup control (no time-of-day rates, heavy zone with good part-load plant, clearness index=0.6, average ambient temperature=65°F, from Braun 1)
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Daily peak electrical usage reduction for optimal versus night setback control: a) minimum unoccupied setpoint=55°F; b) average ambient temperature=85°F (on-peak period: 8 a.m.–8 p.m., 2-to-1 on-to-off peak rates, light zone with flat part-load, clearness index=0.6, from Braun 1)
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Measured cooling requirements and PMV for minimum energy and night setback control (from Morris et al. 9)
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Measured cooling requirements and PMV for minimum demand and night setback control (from Morris et al. 9)
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Comparison of zone sensible cooling loads for interior, east, south and west zones for Iowa Energy Center tests (from Braun et al. 11)
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Comparison of total sensible cooling loads for Iowa Energy Center tests (from Braun et al. 11)
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Comparison of average zone temperatures for Iowa Energy Center tests (from Braun et al. 11)
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Total coil load for east and west chiller units (from Keeney and Braun 13)
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Measured comfort index under precooling strategy (from Keeney and Braun 13)
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Weekday hourly zone temperature setpoint definitions for a) Night Setup, Light Precool, Moderate, and Extended Precool strategies and b) Night Setup, Maximum Discharge, and Linear Temperature Rise strategies (from Braun et al. 14).
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Regional comparison of the savings potential of different control strategies under different climatic conditions and different utility rate structures (from Braun et al. 14)

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