SavedAdd your journal

Journals / Journal of Eta Maritime Science / 2016 / Cilt: 4 - Sayı: 2

Exergy Analysis of the Refrigerating System of a Ship Operating in Variable Sea Water Temperature Conditions

Değişken Deniz Suyu Sıcaklıklarında Çalışan Bir Gemiye Ait Soğutma Sisteminin Ekserji Analizi

VEYSİ BAŞHAN
Adnan PARLAK
Pages
149–156
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It was observed that the maximum exergy destructions of the refrigeration system occur in the compressor and in the expansion valve

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Exergy destructions of refrigerating system components are calculated in this study by carrying out exergy analysis of a vapor compression refrigeration system on board a ship which operates on variable sea water temperature conditions.
📊
Key Findings & Data:The effects of evaporation temperature corresponding to sea water temperature, condensation temperature, subcooling, superheating and compressor outlet pressure variances on COP, the 2nd Law efficiency and exergy destruction are parametrically examined.
💡
Conclusion & Impact:It was observed that the maximum exergy destructions of the refrigeration system occur in the compressor and in the expansion valve
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Exergy destructions of refrigerating system components are calculated in this study by carrying out exergy analysis of a vapor compression refrigeration system on board a ship which operates on variable sea water temperature conditions. The effects of evaporation temperature corresponding to sea water temperature, condensation temperature, subcooling, superheating and compressor outlet pressure variances on COP, the 2nd Law efficiency and exergy destruction are parametrically examined. R134A was used as the refrigerating agent in the vapor-compression cooling system. As a result of the study, it was observed that exergy destructions reduce while COP and 2nd Law efficiency increase when sea water temperature decreases. While COP, 2nd Law efficiency and total exergy destruction are found as 2.79, 65%, and 10.87 kW respectively at 40 °C sea water temperature; the values have been calculated as 5.35, 89%, 7.55 kW respectively when sea water temperature is decreased to 18 °C. It was observed that the maximum exergy destructions of the refrigeration system occur in the compressor and in the expansion valve

Özet

Bu çalışmada değişken deniz suyu sıcaklıklarında çalışan buhar sıkıştırmalı bir gemi soğutma sisteminin ekserji analizi yapılarak soğutma sistemi bileşenlerinin ekserji yıkımları hesaplanmıştır. Çalışmada, deniz suyu sıcaklığına bağlı olarak buharlaşma sıcaklığı, yoğunlaşma sıcaklığı, aşırı soğutma sıcaklığı, aşırı kızdırma sıcaklığı ve kompresör çıkış basınç değişimlerinin STK, II. Kanun verimi ve Ekserji yıkımına etkileri parametrik olarak incelenmiştir. Soğutma sisteminin analizinde soğutucu akışkan olarak R134A kullanılmıştır. Çalışma sonucunda deniz suyu sıcaklığı düştükçe STK ve II. Kanun verimi artarken ekserji yıkımlarının ise azaldığı görülmüştür. 40 °C deniz suyu sıcaklığında STK 2.79, II. Kanun verimi %65, toplam ekserji yıkımı 10.87 kW iken sıcaklık 18 °C ye düştüğünde ise STK 5.35, II. Kanun verimi %89 ve toplam ekserji yıkımı 7.55 kW olmaktadır. Soğutma sisteminde en büyük ekserji yıkımının kompresör ve genişleme vanasında olduğu görülmüştür

🔖

Cite This Article

BAŞHAN, V., PARLAK, A. (2016). Exergy Analysis of the Refrigerating System of a Ship Operating in Variable Sea Water Temperature Conditions. Journal of Eta Maritime Science, Cilt: 4 - Sayı: 2, 149–156. https://ajindex.com/articles/195573

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (14)

  1. Yumrutas R, Kunduz M and Kanoglu M. (2002). Exergy analysis of vapor compression refrigeration systems. Exergy: An International Journal; 2:2 66–72
  2. Wall, G. and Gong, M., (2001). “On exergy and Sustainable developmentPart 1:Conditions and Concepts”, Exergy, An International Journal, 1(3): 128-145
  3. Guid Bosnjakovic, F., Knoche, K. F. and Stehmeier, D., (1986). “Exergetic Analysis of Ammonia-Water Absorption Heat Pumps”, ComputerAided Engineering of Energy Systems, 3:93-104
  4. Başhan, V. (2015). Gemilerde Kullanılan Soğutma Sistemlerinin Değişken Çevre Şartlarına Göre Performans Analizi, Yüksek Lisans Tezi, YTÜ Fen Bilimleri Enstitüsü, İstanbul
  5. Sivakumar, M. and Somasundaram, P., (2014). Exergy and energy analysis of three stage auto refrigerating cascade system using zeotropic mixture for sustainable development. Energy. Convers. Manage 84, 589-596
  6. Yang, Min-Hsiung and Rong-Hua Yeh. (2015). “Performance and Exergy Destruction Analyses of Optimal Subcooling for Vapor-Compression Refrigeration Systems.” International Journal of Heat and Mass Transfer 87: 1–10
  7. Jain, Vaibhav, S.S. Kachhwaha, and Gulshan Sachdeva. (2013) “Thermodynamic Performance Analysis of a Vapor Compression– absorption Cascaded Refrigeration System.” Energy Conversion and Management 75: 685–700
  8. T. Morosuk, and G. Tsatsaronis, (2009). Advanced exergetic evaluation of refrigeration machines using different working fluids, Energy 34 2248– 2258
  9. J.U. Ahamed, R. Saidur and H.H. Masjuki, (2011). A review on exergy analysis of vapor compression refrigeration system, Renewable Sustainable Energy Rev. 15 1593– 1600
  10. C. Aprea and A. Greco, (2003). Performance evaluation of R22 and R407C in a vapour compression plant with reciprocating compressor, Appl. Therm. Eng. 23 215–227
  11. M. Hsiao, C. Cheng, M. Huang and S. Chen, (2009). Performance enhancement of a subcooled cold storage air conditioning system, Energy Convers. Manage. 50 2992– 2998
  12. Ozgener, L., Hepbasli, A. and Dincer, I. (2005). Energy and exergy analysis of geothermal district heating systems: an application. Building and Environment, 40(10), 1309-1322
  13. Bejan, A. (2002). Fundamentals of exergy analysis, entropy generation minimization, and the generation of flow architecture. International Journal of Energy Research, 26(7), 545-565
  14. Cengel, A.Y. and Wood, B., Dincer, I., (2002). Is bigger thermodynamically better?. Exergy, an International Journal, 2(2), 62-68.