The Irreversible Evolution of Buildings

The Irreversible Evolution of Buildings


Energy Systems Research Unit, University of Strathclyde (Glasgow, UK)

Beyond Architecture Group (Rome, Italy)

28 Febuary 2017
| Citation



Buildings, which are in fact ecosystems (living and inanimate organisms interacting together), are nowadays conceived and operated on the base of energy assessments underpinned by the first law of thermodynamics, and design strategies work towards energy conservation. Different approaches, based on the second law of thermodynamics, exist in research; they use the thermodynamic function called exergy - a measure of energy quality obtained from the combination of first and second law - and their scope is still centred on conservation strategies, optimised through irreversibility reduction. However, irreversibility plays a key role in nature, as entropy production dictates the direction and modality of all processes and real phenomena are actually irreversible. The main problem related to the forefront of high-efficiency buildings is their high cost and complexity, which contrast stridently with the needs of the largest part of the built environment: effective low-budget sustainable solutions, easy to raise and control by non-specialised users. This research, through a pragmatic methodology, mixes practi- cal experiences from low-budget construction sites with concepts from the relatively new discipline of non-equilibrium thermodynamics, and proposes an alternative energy design approach based on the second law of thermodynamics. Thinking of buildings as evolving ecosystems, their ability to perceive and exploit useful gradients can be enhanced through a deeper understanding of the role of irrevers- ibility as the driving force of spontaneous processes, and imperfection as an intrinsic characteristic of architecture.


buildings, exergy, irreversibility, low-cost, spontaneous processes.


[1] World Energy Council, World Energy Resources: 2013 survey. Technical report, World Energy Council, London, 2013.

[2] Kochhar, R., A global middle class is more promise than reality. Technical report, Washington, D.C., 2015.

[3] Middlemiss, L. & Gillard, R., Fuel poverty from the bottom-up: Characterising house- hold energy vulnerability through the lived experience of the fuel poor. Energy Research and Social Science, 6, pp. 146–154, 2015.

[4] Nicol, F., Humphreys, M. & Roaf, S., Adaptive Thermal Comfort: Principles and Prac- tice, 1, Routledge, p. 208, 2012.

[5] Parvin, A., Saxby, D., Cerulli, C. & Schneider, T., A Right to Build, University of Shef- field: Sheffield, p. 158, 2011.

[6] Schneider, E.D. & Sagan, D., Into the Cool: Energy Flow, Thermodynamics, and Life, University of Chicago Press, p. 362, 2005.

[7] Robinson, D., Introduction to ecosystems, available at:, 2016.

[8] Wicken, J., Evolution, Thermodynamics and Information: Extending the Darwinian Program, Oxford University Press: New York, p. 243, 1987.

[9] Goldkuhl, G., Design research in search for a paradigm: Pragmatism is the answer. Practical Aspects of Design Science: European Design Science Symposium, EDSS 2011, October 14, 2011, Springer: Leixlip, Ireland, pp. 84–95, 2012.

[10] Lebon, G., Jou, D. & Casas-Vazquez, J., Understanding Non-equilibrium Thermody- namics, Springer: Berlin, p. 196, 2008.

[11] Demirel, Y., Nonequilibrium Thermodynamics: Transport and Rate Processes in Physi- cal, Chemical and Biological Systems, pp. 39–145, 2014.

[12] Schreiber, A. & Gimbel, S., Evolution and the Second Law of Thermodynamics: Effec- tively Communicating to Non-technicians, Springer Science+Business Media, 3, pp. 1–17, 2010.

[13] Bejan, A., Constructal-theory network of conducting paths for cooling a heat generating volume. International Journal of Heat and Mass Transfer, 40(4), pp. 799–816, 1997.

[14] Bejan, A., Constructal thermodynamics. International Journal of Heat and Technology, 34(Special Issue 1), pp. S1–S8, 2016.

[15] Grecos, A. & Prigogine, I., On the problem of irreversibility in theoretical physics.  Proceedings of the Sixth International Congress of Logic, Methodology and Philoso- phy of Science, eds H.P. L. Jonathan Cohen, Jerzy Los & K.P. Podewski, Elsevier, 104, pp. 429–439, 1982.