Topic
Thermal efficiency
About: Thermal efficiency is a research topic. Over the lifetime, 20911 publications have been published within this topic receiving 302373 citations. The topic is also known as: thermodynamic efficiency & efficiency.
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TL;DR: In this paper, an analytical model of the heat transfer in a parametric 360 deg cylindrical and tubular central receiver was developed to examine the receiver's efficiency characteristics, which are based on different irradiation levels relative to the receivers's design point, are, then, used to interpolate the receivers thermal efficiency in an hourly based annual calculation of one typical year that is defined by hourly based real measurements of the direct normal irradiance and the ambient temperature.
Abstract: For clean and efficient electric power generation, the combination of solar power towers (SPTs) with ultrasupercritical steam cycle power plants could be the next development step. The methodology of the European concentrated solar thermal roadmap study was used to predict the annual performance and the cost reduction potential of this option applying tubular receivers with various appropriate high temperature heat transfer media (HTM). For the assessment, an analytical model of the heat transfer in a parametric 360 deg cylindrical and tubular central receiver was developed to examine the receiver's efficiency characteristics. The receiver's efficiency characteristics, which are based on different irradiation levels relative to the receiver's design point, are, then, used to interpolate the receiver's thermal efficiency in an hourly based annual calculation of one typical year that is defined by hourly based real measurements of the direct normal irradiance and the ambient temperature. Applying appropriate cost assumptions from literature, the levelized electricity costs (LEC) were estimated for each considered SPT concept and compared with the reference case, which is a scale-up of the state of the art molten salt concept. The power level of all compared concepts and the reference case is 50 MW el . The sensitivity of the specific cost assumptions for the LEC was evaluated for each concept variation. No detailed evaluation was done for the thermal storage but comparable costs were assumed for all cases. The results indicate a significant cost reduction potential of up to 15% LEC reduction in the liquid metal HTM processes. Due to annual performance based parametric studies of the number of receiver panels and storage capacity the results also indicate the optimal values of these parameters con cerning minimal LEC.
82 citations
TL;DR: In this paper, an integrated system of simultaneous power generation, refrigeration and desalination cycle using a molten carbonate fuel cell, is developed and investigated, and the process is simulated by HYSYS and MATLAB softwares.
82 citations
TL;DR: In this article, the effects of advanced pilot injection degree (APID) on the thermodynamics, combustion and emission characteristics of NG-diesel dual fuel engine were analyzed by computational fluid dynamics simulation and bench test.
82 citations
TL;DR: In this article, the effect of hydrogen addition on the flame propagation, emissions formation, energy balance and the relationships between exhaust emissions and mediate species during flame propagation in the natural gas (NG) SI engine was investigated.
82 citations
TL;DR: In this article, a solar dish collector is considered with a rectangular cavity receiver, and the main objective is the calculation of the optimum parameters for attaining the maximum overall thermal efficiency of the system.
82 citations