Using Computational Fluid Dynamics (CFD), four different cooling systems used in contemporary office environments are modeled to compare energy consumption and thermal comfort levels. Incorporating convection and radiation technologies, full-scale models of an office room compare arrangements for (a) an all-air overhead system (mixing ventilation), (b) a combined air and hydronic radiant system (overhead system with a chilled ceiling), (c) an all-air raised floor system (displacement ventilation), and (d) a combined air and hydronic radiant system (displacement ventilation with a chilled ceiling). The computational domain for each model consists of one temperature varying wall (simulating the temperature of the exterior wall of the building during a 24-hour period) and adiabatic conditions for the remaining walls, floor, and ceiling (simulating interior walls of the room). Two sets of computations are conducted. The first set considers a glass window and plastic shade configuration for the exterior wall to compare the four cooling systems. The second set of computations consider a glass window, a phase change material layer and the plastic shade configuration for the exterior wall to examine the effect of the phase change material (PCM) layer on the cooling energy requirements. Both sets of simulations assumed an external wall that changed temperature as a function of time simulating the temperature changes on the exterior wall of the room during a 24 hour period. Results show superior thermal comfort levels as well as substantial energy savings can be accrued using the displacement ventilation and especially the displacement ventilation with a chilled ceiling over the conventional overhead mixing ventilation system. The results also show that the addition of a PCM layer to the exterior wall can significantly decrease the cooling energy requirements.
Skip Nav Destination
ASME 2011 5th International Conference on Energy Sustainability
August 7–10, 2011
Washington, DC, USA
Conference Sponsors:
- Advanced Energy Systems Division and Solar Energy Division
ISBN:
978-0-7918-5468-6
PROCEEDINGS PAPER
Increasing Energy Efficiency of HVAC Systems of Buildings Using Phase Change Material
Lee Chusak,
Lee Chusak
Washington University, Saint Louis, MO
Search for other works by this author on:
Jared Daiber,
Jared Daiber
Washington University, Saint Louis, MO
Search for other works by this author on:
Ramesh Agarwal
Ramesh Agarwal
Washington University, Saint Louis, MO
Search for other works by this author on:
Lee Chusak
Washington University, Saint Louis, MO
Jared Daiber
Washington University, Saint Louis, MO
Ramesh Agarwal
Washington University, Saint Louis, MO
Paper No:
ES2011-54079, pp. 47-55; 9 pages
Published Online:
March 13, 2012
Citation
Chusak, L, Daiber, J, & Agarwal, R. "Increasing Energy Efficiency of HVAC Systems of Buildings Using Phase Change Material." Proceedings of the ASME 2011 5th International Conference on Energy Sustainability. ASME 2011 5th International Conference on Energy Sustainability, Parts A, B, and C. Washington, DC, USA. August 7–10, 2011. pp. 47-55. ASME. https://doi.org/10.1115/ES2011-54079
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Assessment of Dynamic Photovoltaic Shading Systems on Energy Performance of Commercial Buildings
J. Eng. Sustain. Bldgs. Cities (November,2022)
Model-based extreme weather data for predicting the performance of buildings entirely conditioned by ambient energy
J. Eng. Sustain. Bldgs. Cities (January,0001)
Insulated Glass Unit in High-Glazed Office Buildings in Brazil: Comparative HVAC Consumption Analyses
J. Eng. Sustain. Bldgs. Cities (May,2022)
Related Chapters
Inside the Building
Geothermal Heat Pump and Heat Engine Systems: Theory and Practice
Integration of Solar Energy Systems
Handbook of Integrated and Sustainable Buildings Equipment and Systems, Volume I: Energy Systems
Dynamic Cool Roofing Systems
Advanced Energy Efficient Building Envelope Systems