CANDENİZ SEÇKİN

Effect of Variation in Heat Supply to the Performance of a Biomass-fired Combined Power and Refrigeration Cycle – Utilization of Kalina Cycle Heat in an Ejector Refrigeration Cycle

Abstract

In this study, a novel combined cycle of power and refrigeration production is proposed which is a combination of Kalina cycle and ejector refrigeration cycle. In the proposed configuration of the combined cycle, an ejector refrigeration cycle is inserted into the Kalina cycle to generate refrigeration by utilizing the high energy content of one working fluid stream in Kalina cycle which does not directly contribute to the power production of the Kalina cycle. Supplied heat to the proposed combined cycle is derived from biomass which is a renewable energy source and is regarded as a promising alternative to fossil fuel consumption in energy generation processes. A parametric analysis is performed to determine the effect of variation in the rate of heat supplied to the combined cycle and the amount of biomass consumed in heat generation on selected performance parameters of the combined cycle: thermal efficiency, power production and refrigeration generation. A computational program is developed to simulate the combined cycle and details of the applied mathematical model are reported in the study. It is determined that increasing heat supply to the combined cycle results in increase in net power production of the cycle. Refrigeration capacity is not influenced by the heat supply and thermal efficiency follows a decreasing trend as supplied heat to the combined cycle increases.

Biography

Candeniz SECKIN – Candeniz Seçkin received her Bachelor of Science degree in Mechanical Engineering in 2002 from Istanbul Technical University (ITU), Istanbul, Turkey. In 2003, she was recruited to ITU, Energy Institute as a Research Assistant. She received her Master of Science degree in Energy Science and Technology from ITU, Energy Institute in 2006, Istanbul, Turkey. She received her PhD degree from the same university in 2013. She was a visiting researcher in Universita Degli di Roma “La Sapienza”, Mechanical Engineering Department, Rome, Italy between 2010-2012. Currently, she carries out her teaching and research activities at Marmara University, Engineering Faculty, Mechanical Engineering Department as an Assistant Professor. Her research interests are refrigeration systems, power production, solar energy systems, resource use accounting in energy generation