ASHRAE Journal - January 2013 - 46

minimum period of time (based on manufacturer’s minimum cycling criteria), the heat pump compressor is reenergized. This simple control sequence increases efficiency, avoids excessive strain on the compressor and avoids over-pressure safety trips by the heat pump control system.

construction techniques. These will be discussed in Parts 2 and 3 of this series.

References
1. Bean, R., B.W. Olesen, Kim, K.W. 2010. “History of radiant heating and cooling systems.” ASHRAE Journal (1):40–47. 2. 2009 ASHRAE Handbook—Fundamentals, p. 9.7–9.8. 3. Wang, Z., et al. 2009. “Evaluating Thermal Comfort of Radiant Floors and Ceilings.” 4th International Building Physics Conference. 4. Oleson, B.W. 2008. “Radiant cooling floor systems.” ASHRAE Journal (9):18. 5. Stetiu, C., H.E. Feustel, Y. Nakano. 1996. “Ventilation Control Strategies for Buildings with Hydronic Radiant Conditioning in Hot Humid Climates.” Lawrence Berkeley National Laboratory, Internal Report. 6. Moore, T. 2008. “Potential and limitations for hydronic radiant slabs using waterside free cooling and dedicated outside air systems.” Proceedings of the Third National Conference of IBPSA-USA, p. 148–155. 7. Olesen, B.W. 2011. “Radiant heating and cooling by embedded water-based systems.” Proceedings of I Congreso Climatizacion Eficiente, p.4. 8. Moe, K. 2010. Thermally Active Surfaces in Architecture, p. 84–93. New York, NY: Princeton Architectural Press.

Summary
Radiant heating and cooling slab systems are a powerful strategy for energy efficiency and comfort improvement when used appropriately. The aspiring designer must understand the advantages and limitations of the technology to achieve good results. The two most effective applications of the technology are the sunspace, using the effectiveness of the radiant floor for removing absorbed solar heat gain and the bâtiment isothermale, which exploits the active manipulation of the building thermal mass to maintain constant conditions inside a super-insulated building envelope. Thermally active slabs are especially effective when used with ground source heat pumps, exploiting the efficiency gains from increased thermal coupling and lower temperature differential to the conditioned space. Successful projects require instructive design tools and effective

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46

ASHRAE Journal

January 2013



ASHRAE Journal - January 2013

Table of Contents for the Digital Edition of ASHRAE Journal - January 2013

ASHRAE Journal - January 2013
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
Long-Term Commercial GSHP Performance: Part 6: Maintenance and Controls
Thermally Active Floors, Part 1
Technology Award Case Studies:
Aquathermal Systems
Standing Columns
Data Centers
People
Emerging Technologies
IAQ Applications
Engineer's Notebook
Washington Report
Refrigeration Applications
Classified Advertising
Advertisers Index
ASHRAE Journal - January 2013 - ASHRAE Journal - January 2013
ASHRAE Journal - January 2013 - Cover2
ASHRAE Journal - January 2013 - 1
ASHRAE Journal - January 2013 - 2
ASHRAE Journal - January 2013 - Contents
ASHRAE Journal - January 2013 - Commentary
ASHRAE Journal - January 2013 - 5
ASHRAE Journal - January 2013 - Industry News
ASHRAE Journal - January 2013 - 7
ASHRAE Journal - January 2013 - 8
ASHRAE Journal - January 2013 - 9
ASHRAE Journal - January 2013 - 10
ASHRAE Journal - January 2013 - 11
ASHRAE Journal - January 2013 - 12
ASHRAE Journal - January 2013 - 13
ASHRAE Journal - January 2013 - 14
ASHRAE Journal - January 2013 - 15
ASHRAE Journal - January 2013 - Letters
ASHRAE Journal - January 2013 - 17
ASHRAE Journal - January 2013 - Meetings and Shows
ASHRAE Journal - January 2013 - 19
ASHRAE Journal - January 2013 - 20
ASHRAE Journal - January 2013 - 21
ASHRAE Journal - January 2013 - 22
ASHRAE Journal - January 2013 - 23
ASHRAE Journal - January 2013 - Long-Term Commercial GSHP Performance: Part 6: Maintenance and Controls
ASHRAE Journal - January 2013 - 25
ASHRAE Journal - January 2013 - 26
ASHRAE Journal - January 2013 - 27
ASHRAE Journal - January 2013 - 28
ASHRAE Journal - January 2013 - 29
ASHRAE Journal - January 2013 - 30
ASHRAE Journal - January 2013 - 31
ASHRAE Journal - January 2013 - Thermally Active Floors, Part 1
ASHRAE Journal - January 2013 - 33
ASHRAE Journal - January 2013 - 34
ASHRAE Journal - January 2013 - 35
ASHRAE Journal - January 2013 - 36
ASHRAE Journal - January 2013 - 37
ASHRAE Journal - January 2013 - 38
ASHRAE Journal - January 2013 - 39
ASHRAE Journal - January 2013 - 40
ASHRAE Journal - January 2013 - 41
ASHRAE Journal - January 2013 - 42
ASHRAE Journal - January 2013 - 43
ASHRAE Journal - January 2013 - 44
ASHRAE Journal - January 2013 - 45
ASHRAE Journal - January 2013 - 46
ASHRAE Journal - January 2013 - 47
ASHRAE Journal - January 2013 - Aquathermal Systems
ASHRAE Journal - January 2013 - 49
ASHRAE Journal - January 2013 - 50
ASHRAE Journal - January 2013 - 51
ASHRAE Journal - January 2013 - 52
ASHRAE Journal - January 2013 - 53
ASHRAE Journal - January 2013 - 54
ASHRAE Journal - January 2013 - 55
ASHRAE Journal - January 2013 - 56
ASHRAE Journal - January 2013 - 57
ASHRAE Journal - January 2013 - 58
ASHRAE Journal - January 2013 - 59
ASHRAE Journal - January 2013 - 60
ASHRAE Journal - January 2013 - Data Centers
ASHRAE Journal - January 2013 - 62
ASHRAE Journal - January 2013 - 63
ASHRAE Journal - January 2013 - People
ASHRAE Journal - January 2013 - Emerging Technologies
ASHRAE Journal - January 2013 - 66
ASHRAE Journal - January 2013 - 67
ASHRAE Journal - January 2013 - IAQ Applications
ASHRAE Journal - January 2013 - 69
ASHRAE Journal - January 2013 - 70
ASHRAE Journal - January 2013 - 71
ASHRAE Journal - January 2013 - Engineer's Notebook
ASHRAE Journal - January 2013 - 73
ASHRAE Journal - January 2013 - 74
ASHRAE Journal - January 2013 - 75
ASHRAE Journal - January 2013 - Washington Report
ASHRAE Journal - January 2013 - Refrigeration Applications
ASHRAE Journal - January 2013 - Classified Advertising
ASHRAE Journal - January 2013 - Advertisers Index
ASHRAE Journal - January 2013 - 80
ASHRAE Journal - January 2013 - Cover3
ASHRAE Journal - January 2013 - Cover4
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