scholarly journals Comparative study on hydrogen issues of biphenyl/diphenyl oxide and polydimethylsiloxane heat transfer fluids

2020 ◽  
Author(s):  
Christian Jung ◽  
Marion Senholdt
Keyword(s):  
Heat Transfer ◽  
Comparative Study ◽  
Diphenyl Oxide ◽  
Heat Transfer Fluids

scholarly journals Thermal performance evaluation of hot oils and nanofluids by simulation of an indirect heating plant

2020 ◽  
pp. 23-23
Author(s):  
Lis Ostigard ◽  
Silvana Mattedi
Keyword(s):  
Heat Transfer ◽  
Thermal Performance ◽  
Volume Fraction ◽  
Heat Transfer Fluid ◽  
Diphenyl Oxide ◽  
Heat Transfer Fluids ◽  
Industrial Unit ◽  
Lower Heat ◽  
Fractionation Plant ◽  
Heating Plant

This paper aims to analyze the thermal performance of four different heat transfer fluids in a hot oil system located in a paraffin hydrotreatment and fractionation plant of a petroleum refinery. The software Petro-SIM? (KBC-Yokogawa) was employed to elaborate steady-state simulations intended to compare the heat transfer fluid currently used (eutectic of biphenyl and diphenyl oxide) and three fluids proposed as substitutes: paraffin oil (namely n-C13+) produced in the very industrial unit, a nanofluid of eutectic of biphenyl and diphenyl oxide and copper at a 6 % volume fraction, and a CuO/polydimethylsiloxane nanofluid at a 6 % volume fraction. The results showed that n-C13+ was the only heat transfer fluid that could replace the eutectic diphenyl oxide/ biphenyl in the system under analysis since it absorbed the heat duty of 13.79 Gcal/ h, which exceeded the thermal energy of 10.57 Gcal/ h absorbed by the heat transfer fluid currently used at the same operating parameters. The Cu/ eutectic of biphenyl and diphenyl oxide and CuO/polydimethylsiloxane nanofluids presented lower heat duty than the energy needed for the operation of the hot oil system, which was 8.31 Gcal/h and 8.51 Gcal/h, respectively.

scholarly journals Advanced Heat Transfer and Thermal Storage Fluids

Solar Energy ◽  
2005 ◽  
Author(s):  
Luc Moens ◽  
Daniel M. Blake
Keyword(s):  
Heat Transfer ◽  
Freezing Point ◽  
Storage System ◽  
Eutectic Mixture ◽  
Thermal Storage ◽  
Diphenyl Oxide ◽  
Heat Transfer Fluids ◽  
Storage Media ◽  
Operational Characteristics ◽  
Current Heat

The design of the next generation solar parabolic trough systems for power production will require the development of new thermal energy storage options with improved economics or operational characteristics. Current heat transfer fluids such as VP-1™ which consist of a eutectic mixture of biphenyl and diphenyl oxide, allow a maximum operating temperature of ca. 300°C for a direct thermal storage system, At higher temperatures the vapor pressure would become too high and would require pressure rated tanks. The use of VP-1™ also suffers from a freezing point around 13°C that requires heating during cold periods. One of the goals for future trough systems is the use of heat transfer fluids that can act as thermal storage media and that are stable to around 425°C and have a freezing point near or below 0°C. This paper presents an outline of our latest approach towards the development of such thermal storage fluids.

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