The study of heat removal efficiency using a dispersed flow method

2020 ◽  
Author(s):  
A. V. Dedov ◽  
S. V. Mirnov ◽  
A. T. Komov ◽  
A. N. Varava ◽  
I. E. Lyublinski ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Heat Removal ◽  
Dispersed Flow ◽  
Flow Method ◽  
Heat Removal Efficiency

Characteristic Heat Removal Efficiency for Thermosyphon Solar Water Heaters During the System Application Phase

2004 ◽  
Vol 126 (3) ◽  
pp. 950-956 ◽  
Author(s):  
J. M. Chang
Keyword(s):  
Removal Efficiency ◽  
Empirical Model ◽  
System Application ◽  
Heat Removal ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Heat Removal Efficiency ◽  
Solar Water Heaters

The overall performance rating of a thermosyphon solar water heater should take into consideration its heat removal efficiency during the system application phase. This study employs a precise on-line operation to first identify physical heat removal patterns of a thermosyphon solar water heater, and then develops an empirical model for deriving its characteristic heat removal efficiency. This empirical model is in the form of a logarithmic curve, and has a high data correlation coefficient of 0.889 to 0.967. Based upon the empirical model, this study defines a characteristic heat removal efficiency parameter for thermosyphon solar water heaters. Finally, this study establishes a storage tank design method which enables the characteristic heat removal efficiency of the complete system to be optimized.

Research of the capillary structure heat removal efficiency under divertor conditions

1996 ◽  
Vol 233-237 ◽  
pp. 650-654 ◽  
Author(s):  
V.I. Pistunovich ◽  
A.V. Vertkov ◽  
V.A. Evtikhin ◽  
V.M. Korjavin ◽  
I.E. Lyublinski ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Heat Removal ◽  
Capillary Structure ◽  
Heat Removal Efficiency

Empirical Model Rating Method of Heat Removal Efficiency for Vertical Mantle Storage Tanks

Solar Energy ◽  
2005 ◽  
Author(s):  
J. M. Chang
Keyword(s):  
Removal Efficiency ◽  
Thermal Energy ◽  
Empirical Model ◽  
Storage Tank ◽  
Heat Removal ◽  
Energy Output ◽  
Storage Tanks ◽  
Testing Method ◽  
Different Types ◽  
Heat Removal Efficiency

The heat removal efficiency of a storage tank is effective to evaluate the thermal energy that users can obtain during its heat removal phase. With different types and volumes Vt, from 174 L to 1093 L, of six vertical mantle storage tanks widely applied to heat pumps and solar heating systems, the analyses of heat removal patterns were carried out. In addition, using a new integrated variable (Ti − Tw)/ V˙d found from the heat removal patterns, an empirical model of heat removal efficiency has been developed. The study found that the empirical model is a logarithmic curve ηR = aLn((Ti − Tw)/V˙d)+b with a good data correlation coefficient from 0.93 to 0.97. Characteristic heat removal efficiency ηR* was set up with this empirical model based on the relation of ηR* = ηR|(Ti − Tw)/V˙d = 1.5. The characteristic heat removal efficiency ηR* presents the useful thermal energy in a storage tank and the testing method is characterized by fitting it for different types, volumes, charge modes, and discharge modes of storage tanks. It is a practical testing method for the heat removal efficiency testing of a vertical mantle storage tank. The testing method provides the manufacturers of the systems with the information that how many energy output rates of their commercial products can be more improved, and then they can be sure to supply consumers the high quality of products.

scholarly journals Desain dan Optimasi Injection Mold dengan Sistem Slider pada Produk Hardcase Handphone

ROTASI ◽  
2017 ◽  
Vol 19 (4) ◽  
pp. 217
Author(s):  
Muhammad Firdaus Hidayat ◽  
Cahyo Budiyantoro ◽  
Muhammad Budi Nur Rahman
Keyword(s):  
Injection Molding ◽  
Removal Efficiency ◽  
Heat Removal ◽  
Coolant Temperature ◽  
Injection Mold ◽  
Clamping Force ◽  
Heat Removal Efficiency

Peningkatan penggunaan handphone pada era digital saat ini, berdampak pada peningkatan penggunaan pelindung handphone. Hardcase merupakan jenis pelindung handphone dengan bahan material plastik dan proses pembentukan menggunakan metode injection molding. Metode tersebut membutuhkan mold (cetakan) sebagai tempat untuk membentuk/menghasilkan sebuah produk. Dari latar belakang peningkatan penggunaan handphone, maka dibutuhkan perancangan mold untuk menghasilkan produk pelindung handphone berbahan plastik dengan jenis hardcase, sebagai solusi untuk menyediakan aksesoris berupa pelindung handphone pada para pengguna handphone. Pada perancangan hardcase, material yang digunakan pada produk yaitu polycarbonate iupilon GS2010MPH, konstruksi pada pembentukan hardcase menggunakan sistem slider dengan mekanisme angular pin. Software yang digunakan untuk perancangan mold, yaitu catia v5r21 dan software simulasi produk menggunakan autodesk moldflow insight 2016. Simulasi yang dilakukan, yaitu fill dan cooling, masing-masing dibandingkan untuk mendapatkan hasil yang optimal serta dapat diterapkan pada perancangan mold hardcase. Hasil perbandingan dan analisa dari moldflow insight yang dilakukan didapat, fill time yaitu 0,9630 s dengan clamping force 326,2 ton. Kemudian sistem cooling mengunakan tipe seri dengan hasil simulasi Circuit coolant temperature, yaitu 25,63 0C dan hasil simulasi deflection, all effects:deflection, yaitu  0,1411 mm dan hasil simulasi circuit heat removal efficiency, yaitu 1. Hasil perhitungan yang dilakukan pada konstruksi desain mold, dinyatakan aman karena nilai tegangan yang terjadi dibawah tegangan bahan material. Dari hasil perancangan desain dan simulasi, maka mesin yang digunakan yaitu Beston 4500.

scholarly journals Heat removal efficiency of stratum ventilation for air-side modulation

2019 ◽  
Vol 238 ◽  
pp. 1237-1249 ◽  
Author(s):  
Sheng Zhang ◽  
Yong Cheng ◽  
Majeed Olaide Oladokun ◽  
Chao Huan ◽  
Zhang Lin
Keyword(s):  
Removal Efficiency ◽  
Heat Removal ◽  
Heat Removal Efficiency
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