عنوان انگلیسی مقاله:
Redesigning immunization supply chains: Results from three country analyses
ترجمه فارسی عنوان مقاله:
طراحی مجدد زنجیره های تأمین ایمن سازی: نتایج حاصل از سه تحلیل کشور
Sciencedirect - Elsevier - Vaccine, 39 (2021) 2246-2254: doi:10:1016/j:vaccine:2021:03:037
The demand for liquefied natural gas (LNG) is steadily increasing and projected to become an important
component of global energy demand. Although LNG processing requires high-energy to convert the gas into
liquid, it is still the most preferable method of supply due to technical, economic, safety, and political reasons.
Energy integration strategies and process optimization between units have been emphasized as ways to reduce
energy demand. In this study, a rigorous simulation for proposed heat exchanger networks (HENs) between
sulfur recovery units (SRU) and gas sweetening units (GSU) that exhibit heat sources and sinks was conducted.
The HENs were designed using pinch analysis tools in Aspen Energy Analyzer (AEA) and were used to determine
the maximum energy recovery and potential fuel savings after retrofitting within LNG supply chain. The feasibility of retrofitting the HENs into LNG plant without affecting process conditions or product quality was also
determined. Although universal HEN reduces energy consumption of the existing plant by 68%, the network
complexity limits its practical application. Simplified HENs between the sub-units reduced energy demand by
50% and achieved fuel saving of 34%. Retrofitting HENs improved existing LNG energy integration, enhanced
process economy, reduced fossil fuel burning and protected the environment.
Keywords: Natural gas | Retrofitting design | Heat exchange networks (HENs) | Process optimization | Heat recovery