Production of biomass derived highly porous activated carbon: A solution towards in-situ burning of crop residues in India

Thermodynamic analysis for a novel chemical precooling turbojet engine based on a multi-stage precooling-compression cycle

Investigation on water vapor adsorption performance of carbon based composite adsorption material ACF-silica sol-LiCl

Thermodynamic analysis of a novel precooled supersonic turbine engine based on aircraft/engine integrated optimal design

Turbine-based combined cycle (TBCC) engines are a promising system of hypersonic vehicles, the main problem being the thrust gap during propulsion. To solve this problem, we proposed a pre-cooling system of turbofan based on the supercritical carbon dioxide (sCO2) Brayton cycle for TBCC engines fueled by hydrocarbon. A pre-cooler was set in the intake of the turbofan engine to achieve coupling between the Brayton cycle and the turbofan engine. The turbofan and Brayton cycle models were established, and several weight and limited cold source parameters were used to evaluate the system's performance. The effects of the inlet air temperature drop and pressure drop caused by the pre-cooler on the engine performance were obtained. The relationship between thermal performance and system weight of the sCO2 Brayton cycle under different pre-cooling target temperatures and recuperated heat loads was also analyzed. The results showed that it is feasible to use sCO2 to pre-cool the inlet air and generate power. When the pre-cooling target was set to Ma 2.2, the simple cycle could output 347 kW power with a power-to-weight ratio of 0.39 kW/kg. This study provides a new scheme for the pre-cooling and power generation technology of hydrocarbon-fueled TBCC engines. 

Modeling and performance analysis of a pre-cooling and power generation system based on the supercritical CO2 Brayton cycle on turbine-based combined cycle engines

Performance analysis of precooled turbojet engine with a low-temperature endothermic fuel

Two-stage evaporative cooling system with composite activated carbon fiber dehumidification

A solar-assisted regenerative desiccant air conditioning is proposed for humid climate regions. In addition, the indirect evaporative cooling is employed to reduce air temperature. The air conditioning system can work in three different modes: dehumidification (DE), dehumidification-indirect evaporative cooling (DE-IEC), and dehumidification-indirect evaporative cooling-return air (DE-IEC-RA), in response to different humid climate conditions. The working region and system performance of the three working modes are explored theoretically and experimentally. The corresponding temperature regions of the above three working modes are 22–26 ℃, 26–34.7 ℃ and 34.7–40 ℃, respectively. With these operational modes, the supply air temperature and humidity can be within 23.2–26.1 ℃ and 51.4–59.7 %. In DE-IEC and DE-IEC-RA modes, system cooling efficiency ηDE-IEC and ηDE-IEC-RA reach 1.0–2.79 and 1.93–2.70, respectively. Moreover, the relative humidity of the supply air after desiccant dehumidification can be kept below 60 % within 95 min. With solar-assisted electric heating regeneration, the desiccant regeneration time is 24–30 min, 18–28 min shorter than only solar or only electric heating regeneration. 

A solar-assisted regenerative desiccant air conditioning with indirect evaporative cooling for humid climate region

Investigation on Water Vapor Adsorption Performance of Carbon Based Composite Adsorption Material Acf-Silica Sol-Licl

All-day Joule-heat assisted photothermal interfacial water evaporation system with porous network hydrogel

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