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In this paper, a swirl flow generator, namely wavy-tape insert, is tailored for the parabolic trough receiver (PTR) to improve its performances by mean of enhancing the heat transfer inside the absorber tube. A comprehensive computational fluid dynamics model is established to study the flow and heat transfer inside the full-size PTR equipped with wavy-tape insert. It is found that wavy-tape provokes...
The chemical effects of carbon dioxide on the oxidation of biodiesel surrogate, methyl butanoate (MB) were investigated experimentally in the SJTU laminar flow reactor at equivalence ratios of 1.5, 1 and 0.5, at atmospheric pressure. Generally, there are three kinds of effects from carbon dioxide (CO2): thermal, dilution and chemical effects. In this study, argon was replaced by CO2 as the dilute...
A hybrid Large Eddy Simulation (LES) – Reynolds-Averaged Navier-Stokes (RANS) method (HLR) has been applied to simulate an engine related selective catalytic reduction (SCR) system. Typical SCR systems utilize low pressure urea injection together with a mixer for vapor field homogenization. Simultaneously, it is also desirable to reduce spray-wall interaction to avoid urea crystallization. The present...
The effects of fatty acid chain length, number of double bonds and alcohol moiety chain length on combustion and emission characteristics were investigated. With the increase of carbon chain length of methyl ester, HC (hydrocarbon), CO and smoke emissions increase. The particle number concentration of nucleation mode decrease and accumulation mode increases with carbon chain length. The diameter of...
China has surpassed the United States to be the world's largest energy consumer, but a lot of energy was used to produce products for exporting to other countries. Presently, China faces a great challenge in energy security and environmental protection. This paper focuses on the energy embodied in China's foreign trade with a multi-regional input–output approach. Three versions of the GTAP (Global...
Carbon tax is an effective option for internalizing climate change and correcting market failure, an optimal set of carbon taxes can result in superior carbon mitigation. Then what is the optimal trajectory of carbon tax under various carbon-constrained scenarios, and what are the impacts of carbon controls on the economy and performance of carbon-free technologies are important questions to be addressed...
This paper focuses on the investment decision to retrofit an existing supercritical pulverized coal (SCPC) unit with carbon capture and storage (CCS) technology. We establish a valuation model with discrete sequential investment decision-making based on real options theory, and we consider the following uncertainty factors: electricity price, carbon price, CCS investment cost and CO 2 additional...
In this research, the impact of the European Emission Trading Scheme (EU ETS) on the corporate value of European electricity corporations has been measured, and a comparison study of the impact between phase I and phase II of the EU ETS has been performed. To achieve this, a modified multifactor market model has been used to investigate how the development of EU emission allowance (EUA) prices has...
This paper applies portfolio theory to evaluate China's 2020-medium-term plans for generating technologies and its generating portfolio. With reference to the risk of relevant generating-cost streams, the paper discusses China's future development of efficient (Pareto optimal) generating portfolios that enhance energy security in different scenarios, including CO 2 -emission-constrained scenarios...
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