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It has been established in 2030 sustainability objectives as per SDGs that highlight the critical importance of access to affordable, renewable energy, robust, long-term industrial progress, and digital financing in CO 2 emission. The intent of study is to test the trilemma nexus between digital finance, renewable energy consumption, and carbon emission reduction with nonlinear ARDL tests. The study acquired the data and applied the nonlinear ARDL test, split analysis tests, and vector-error correction model (VECM) tests. The results of the study highlighted that the increase of digital finance positively enhances the renewable energy and negatively reduces the CO 2 emissions which we calculate to be 11.4% of the digital finance funding on renewable energy goods. For this, a 39% increase in digital financing is noticed by the research findings during the COVID-19 crisis period. Such robust study findings present the latest insights that digital financing is an eminent and viable source of financing for the trilemma nexus with renewable energy consumption and the CO 2 emissions. Following these, multiple research implications are also presented for the key stakeholders.

A dual-entry turbocharger compressor has a dual-entry impeller with the same blades on both sides of an impeller disc. Flows merge into a common diffuser from two sides of the disc, contributing to over-all mass flow rate of the compressor, and the mass flow rate at either side is distributed with self-adaptation. With the self-adaptive distribution, the difference in the mass flow rates between two impeller sides is slight at the near choke point and gradually raises with the reduction of the compressor over-all mass flow rate. The increased mass flow rate difference can prematurely trigger compressor instability, even surge. When a turbocharged engine operates at high-altitude locations, this becomes a serious issue so that the engine fails to work. To overcome the problem, we propose a new method of using a variable geometry orifice plate at the rear entry of the dual-entry impeller. The orifice can improve the mas flow rate distribution at both impeller sides. The dual-entry compressor performance variations prove the effectiveness of the orifice in terms of the compressor stability boundary extension and suggest a control strategy of variable geometry orifice. The mechanism of the orifice extending the compressor stall margin is the pressure gradient change in front of the rear inducer. An experiment was conducted on a centrifugal compressor, and the test results support the numerical findings.

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