Title: Consequences of energy and exergy utilisation in biological systems

Authors: Sima Kayi; Gülce Aykaç; Idil Başak Temizkan; Mustafa Özilgen

Addresses: Department of Genetics and Bioengineering, Yeditepe University, 34755 Kayisdagi Istanbul, Turkey ' Department of Genetics and Bioengineering, Yeditepe University, 34755 Kayisdagi Istanbul, Turkey ' Department of Genetics and Bioengineering, Yeditepe University, 34755 Kayisdagi Istanbul, Turkey ' Food Engineering Department, Yeditepe University, 34755 Kayisdagi Istanbul, Turkey

Abstract: Thermodynamic consequences of energy utilisation by a volleyball player has been assessed. After employing, the data that the jump-serve speed was 112 km/h and the ball travelled with 31.1 m/s of velocity for 0.4 s, the acceleration of the 270 g ball was 77.75 m/s². It was calculated that during the jump serve, she performed five calories of work; her body released 15 calories of heat, and generated 5.2×10^-6 (kW/kg K) of entropy.

Keywords: biological system; champion volleyball player; internal work performance; external work performance; energy and exergy efficiency; athlete's performance.

DOI: 10.1504/IJEX.2025.146412

International Journal of Exergy, 2025 Vol.47 No.1, pp.64 - 74

Received: 22 Feb 2024
Accepted: 01 Jun 2024
Published online: 28 May 2025 *

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