Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Optimization of a H2 Liquefaction Pre-Cooling Process & Estimate of Liquefaction Performance with Varying Ambient Temperature

Version 1 : Received: 31 August 2021 / Approved: 31 August 2021 / Online: 31 August 2021 (16:00:17 CEST)

How to cite: Jackson, S.; Brodal, E. Optimization of a H2 Liquefaction Pre-Cooling Process & Estimate of Liquefaction Performance with Varying Ambient Temperature. Preprints 2021, 2021080580 (doi: 10.20944/preprints202108.0580.v1). Jackson, S.; Brodal, E. Optimization of a H2 Liquefaction Pre-Cooling Process & Estimate of Liquefaction Performance with Varying Ambient Temperature. Preprints 2021, 2021080580 (doi: 10.20944/preprints202108.0580.v1).

Abstract

Hydrogen used as an energy carrier can provide an important route to the decarbonization of energy supplies. However, realizing this opportunity requires a significant increase in both production and transportation capacity. Part of the increase in transportation capacity could be provided by the shipping of liquid hydrogen, but this introduces an energy-intensive liquefaction step into the supply-chain. The energy required for liquefaction can be reduced by developing improved process designs, but since all low-temperature processes are affected by the available heat-sink temperature, local ambient conditions will also affect the energy penalty. This work studies how the energy consumption associated with liquefaction varies with heat-sink temperature through the optimization of design parameters for a typical next-generation hydrogen liquefaction process. The results show that energy consumption increases by around 20%, across the cooling temperature range 5 to 50 °C. Considering just the range 20 to 30 °C there is a 5% increase, illustrating the significant impact ambient temperature can have on energy consumption.

Keywords

hydrogen; liquefaction; optimization; ambient temperature

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