Numerical optimization of a finned tube bundle heat exchanger arrangement for passive spent fuel pool cooling to ambient air

2020 ◽  
Vol 361 ◽  
pp. 110549 ◽  
Author(s):  
Sebastian Unger ◽  
Eckhard Krepper ◽  
Matthias Beyer ◽  
Uwe Hampel
Keyword(s):  
Heat Exchanger ◽  
Numerical Optimization ◽  
Tube Bundle ◽  
Ambient Air ◽  
Finned Tube ◽  
Spent Fuel ◽  
Spent Fuel Pool

scholarly journals Perancangan Air Cooler Turbin gas Aeroderivative Lm6000 Jenis Compact Heat Exchanger Untuk Meningkatkan Performa Turbin gas

2020 ◽  
Vol 1 (1) ◽  
pp. 61-70
Author(s):  
Dimas Rianto Utomo ◽  
Belyamin Belyamin ◽  
Sonki Prasetya
Keyword(s):  
Heat Exchanger ◽  
Tube Bundle ◽  
Low Pressure ◽  
Finned Tube ◽  
Air Cooling ◽  
Compact Heat Exchanger ◽  
Turbine Inlet ◽  
Air System ◽  
Air Cooler ◽  
Pressure Compressor

Temperatur udara ambient berpengaruh pada performa turbin gas. Temperatur yang tinggi mengakibatkan masa jenis udara menjadi rendah sehingga pada laju aliran udara masuk kompresor lebih sedikit. Teknologi untuk memitigasi permasalahan ini adalah penggunaan Turbine Inlet Air Cooling (TIAC) pada inlet air system turbin gas. Penelitian ini bertujuan untuk mendesain air cooler dengan tipe staggered continous finned tube compact heat exchanger pada turbin gas Lm6000 milik PT.X di Karawang. Proses perancangan air cooler dilakukan dengan  menggunakan perhitungan Kern. Data yang dibutuhkan dalam penelitian ini adalah data dimensi maksimum air cooler, data temperatur air pendingin, data pengoperasi turbin gas dan data bahan bakar yang diambil sebelum dan sesudah pemasangan TIAC menggunakan beban turbin gas yang sama yaitu 22 MW. Hasil yang didapat dari proses perancangan air cooler adalah desain air cooler dengan 187 tube bundle dan nilai koefisien konveksi keseluruhan sebesar 35,4 W/m²°C. Analisis performa turbin gas menunjukkan bahwa temperatur inlet low pressure compressor mengalami penurunan rata-rata sebesar 3,5°C, sementara efisiensi siklus rata-rata meningkat sebesar 1,65%. Adapun peningkatan daya bersih rata-rata sebesar 0,496 MW karenanya dapat menghasilkan  penghematan biaya bahan bakar sebesar Rp1.554.257.011 per tahun.

Advanced Cooling Tube Mobile Heat Exchanger in the Outer Shape of a Fuel Assembly for Spent Fuel Pool Cooling

2016 ◽  
Author(s):  
Matthias Reuter ◽  
Leo Ornot ◽  
Torsten Maier ◽  
Thomas Fuchs ◽  
Kerstin Gauter ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Fuel Assembly ◽  
Nuclear Power ◽  
Test Facility ◽  
Spent Fuel ◽  
Fukushima Accident ◽  
Cooling Tube ◽  
Spent Fuel Pool ◽  
Scale Test ◽  
Safety Features

After the Fukushima accident the development and implementation of additional safety features has become more and more important. In March 2014 AREVA filed a patent for the invention of a mobile heat exchanger module in the outer shape similar to the outer geometry of a fuel assembly called Advanced Cooling Tube (ACT) [1]. Since January 2015 there is a full scale test facility in the German headquarters of AREVA in Erlangen to test the performance of such a mobile heat exchanger. In spring 2015 there were investigations running to implement the ACT into the spent fuel pool of a nuclear power plant in Switzerland. In the meantime, these investigations were finished and a contract has been signed. This paper gives an overview about the main facts of the Advanced Cooling Tube as a mobile heat exchanger in the shape of a fuel assembly for spent fuel pools, how it can be implemented in any nuclear power station and what the advantages of this product are. Further information about the performance and requirements of this special heat exchanger will be given.

Experimental Investigation of Heat Transfer Enhancement by Using Different Number of Fins in Circular Tube

2018 ◽  
Vol 6 (3) ◽  
pp. 1-12
Author(s):  
Kamil Abdul Hussien
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Cold Water ◽  
Finned Tube ◽  
Hot Water ◽  
Copper Tube ◽  
Smooth Tube ◽  
Tube Heat Exchanger ◽  
Mass Flow Rates ◽  
Flow Heat

Abstract-The present work investigates the enhancement of heat transfer by using different number of circular fins (8, 10, 12, 16, and 20) in double tube counter flow heat exchanger experimentally. The fins are made of copper with dimensions 66 mm OD, 22 mm ID and 1 mm thickness. Each fin has three of 14 mm diameter perforations located at 120o from each to another. The fins are fixed on a straight smooth copper tube of 1 m length, 19.9 mm ID and 22.2 mm OD. The tube is inserted inside the insulated PVC tube of 100 mm ID. The cold water is pumped around the finned copper tube, inside the PVC, at mass flow rates range (0.01019 - 0.0219) kg/s. The Reynold's number of hot water ranges (640 - 1921). The experiment results are obtained using six double tube heat exchanger (1 smooth tube and the other 5 are finned one). The results, illustrated that the heat transfer coefficient proportionally with the number of fin. The results also showed that the enhancement ratio of heat transfer for finned tube is higher than for smooth tube with (9.2, 10.2, 11.1, 12.1 13.1) times for number of fins (8, 10, 12, 16 and 20) respectively.

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