Showing papers on "Gas compressor published in 2022"
TL;DR: In this article, the authors report all the studies related to 21st-century refrigerants comprising sustainable refrigerants for longer use, including their thermophysical properties, leakage in the compressor and the condenser, explosion characteristics due to leakage, and consequences of leakage and explosion.
36 citations
TL;DR: In this paper , the authors report all the studies related to 21st-century refrigerants comprising sustainable refrigerants for longer use, including their thermophysical properties, leakage in the compressor and the condenser, explosion characteristics due to leakage, and consequences of leakage and explosion.
28 citations
TL;DR: In this paper , the authors present the prevailing challenges and recent advancements of high-pressure PEM electrolysers towards a green and cheap hydrogen production cost, as well as the possible pathways for driving cost-effective green hydrogen production based on the present and future state of art.
28 citations
TL;DR: In this paper , a novel compound PV/T (photovoltaic thermal) waste heat driven ejector-heat pump system for simultaneous data center cooling and waste heat recovery for district heating networks is presented.
Abstract: This work presents an energy, exergy, and environmental evaluation of a novel compound PV/T (photovoltaic thermal) waste heat driven ejector-heat pump system for simultaneous data center cooling and waste heat recovery for district heating networks. The system uses PV/T waste heat with an evaporative-condenser as a driving force for an ejector while exploiting the generated electric power to operate the heat pump compressor and pumps. The vapor compression system assessed several environmentally friendly strategies. The study compares eleven lower global warming potential (GWP) refrigerants from different ASHRAE safety groups (R450A, R513A, R515A, R515B, R516A, R152a, R444A, R1234ze(E), R1234yf, R290, and R1243zf) with the hydrofluorocarbon (HFC) R134a. The results prove that the system presents a remarkable overall performance enhancement for all investigated refrigerants in both modes. Regarding the energy analysis, the cooling coefficient of performance (COPC) enhancement ranges from 15% to 54% compared with a traditional R134a heat pump. The most pronounced COPC enhancement is caused by R515B (a 54% COPC enhancement and 49% heating COP enhancement), followed by R515A and R1234ze(E). Concerning the exergy analysis, R515B shows the lowest exergy destruction, with the highest exergy efficiency than all investigated refrigerants.
26 citations
TL;DR: In this paper , a four-phase interleaved boost converter (IBC) and controller for PEMFC UAVs is designed to decrease energy loss and strengthen the anti-interference ability for high-power fuel cell applications.
24 citations
TL;DR: In this paper, a heat-driven multi-stage thermo-acoustic cooler is proposed to satisfy cooling requirements in the applications of natural gas liquefaction and high-temperature superconductivity.
23 citations
TL;DR: In this paper, a three-stage metal hydride hydrogen compressors (MHHC) design is proposed, where LaNi5-based alloys are mainly used in high-density hydrogen storage and primary hydrogen compression, while TiCr2-based alloy is considered as the candidate alloys in intermediate and final hydrogen compression.
22 citations
TL;DR: In this paper , a three-stage metal hydride hydrogen compressors (MHHC) design is proposed, where LaNi5-based alloys are mainly used in high-density hydrogen storage and primary hydrogen compression, while TiCr2-based alloy is considered as the candidate alloys in intermediate and final hydrogen compression.
22 citations
TL;DR: In this paper , a heat-driven multi-stage thermo-acoustic cooler is proposed to satisfy cooling requirements in the applications of natural gas liquefaction and high-temperature superconductivity.
21 citations
TL;DR: In this article , a system consisting of PEMFC and ORC is modeled and analyzed from the thermodynamic aspects, and the analysis is developed in Intel Fortran Compiler within the Microsoft Visual Studio.
19 citations
TL;DR: In this paper , an integrated combined cycle including GTs, solid oxide fuel cell (SOFC), steam and organic Rankine cycles (SORCs) have been proposed for compressor stations to produce extra power.
TL;DR: In this paper , the authors presented a parametric study for a new hybrid tri-generation energy system, where a regenerative gas turbine cycle (RGTC) is the runner system, while Kalina cycle (KC) and ejector refrigeration cycle (ERC) are considered as companion elements.
TL;DR: In this paper , a numerical equation of the internal flow channel of the TSEAC (Two-stage Electric Air Compressor) was established, and the validity of the numerical equation was verified by the experimental study.
TL;DR: In this article , the authors evaluated four different gas turbine cogeneration cycles which are basic, absorption cooling, air heating and air fuel heating cogenerations by using the most important six evaluation criteria for different excess air coefficient, different compression rates, and different compressor inlet air temperatures.
Abstract: Abstract The purpose of this article is to evaluate four different gas turbine cogeneration cycles which are basic, absorption cooling, air heating and air fuel heating cogeneration cycles by using the most important six evaluation criteria for different excess air coefficient, different compression rates, and different compressor inlet air temperatures. These six evaluation criteria are electrical heat ratio, exergy efficiency, incremental heat rate, artificial thermal efficiency, fuel energy saving ratio, and specific fuel consumption. It is seen that the air-fuel heating cogeneration cycle is the most efficient among the cycles examined for a certain compressor compression ratio, followed by the air heating, basic, and absorption cooling cycles.
TL;DR: In this article, the authors presented a thermodynamic investigation on the configuration optimization of the ejector-enhanced auto-cascade refrigeration cycles for low temperature freezers, and the most significant performance improvements were obtained in the optimized cycle, which simultaneously adopts the dual-IHX at the condenser and evaporator outlets.
TL;DR: In this article , a model of a proton exchange membrane fuel cell (PEMFC) system for marine power systems is presented, which can be used for simulators and design optimizations with real-time capabilities.
TL;DR: In this paper , a theoretical assessment of an adsorption-assisted cascade compression refrigeration system powered by photovoltaic/thermal collectors is performed, which is intended to produce refrigeration and electricity simultaneously.
TL;DR: In this article , an integrated model of solar power tower coupling with the Brayton power cycle is developed, and the particle swarm optimization algorithm is utilized to search for the optimal operation parameters and control schemes under off-design conditions with various ambient temperatures.
TL;DR: In this article , the performance of a flame-assisted fuel cell integrated with a gas turbine operating with six fuels (CH4, C3H8, JP-4, JP5, JP10, and H2) was investigated.
TL;DR: In this article, a new cycle layout for the supercritical carbon dioxide with its better integration capabilities with heat sources for increased temperature difference across the receiver has been proposed and analyzed in the current study.
TL;DR: In this article , a new composition of the working fluid, nitrous oxide and helium (N2O-He) mixture is used in the cycle to improve the thermal efficiency of the nuclear power system.
TL;DR: In this article , a new structure design and the design methodology of the ionic liquid compressor were proposed for simulating the thermodynamic process, which was verified by the experimental data, and the results showed that the delayed closing of the discharge valve would take place due to a high or low stiffness of the valve.
Abstract: The ionic liquid compressor is regarded as the most promising compression technology for the hydrogen refuelling station due to the combined application of ionic liquid and the hydraulic driving system. However, the design, mathematical and experimental investigations of the ionic compressor are still absent from the open literature. This paper proposed a new structure design and the design methodology of the ionic liquid compressor. The mathematical modelling considering the valve dynamics was provided for simulating the thermodynamic process, which was verified by the experimental data. The results showed that the delayed closing of the discharge valve would take place due to a high or low stiffness of the valve. The increase in the stiffness alleviated the rebound issue of the suction valve. An increase in the stroke to diameter ratio could solve the rebound issue of the discharge valve. A low or high trajectory coefficient would cause an intense rebound during the closing procedure of the discharge valve. The designed results of the main parameters of the compressor based on the simulation were the suction valve stiffness of 100 N/m, the discharge valve stiffness of 500 N/m, the stroke to diameter ratio of 1.0, and the trajectory coefficient of 0.125 under the given design condition.
TL;DR: In this paper , a GA optimization-based multistage constant-compressor speed (MCCS) air conditioning system control strategy is proposed, which sets the cabin temperature as the input control factor and the compressor speed as the output factor, and different cabin temperature ranges correspond to the MCCSs.
TL;DR: In this article , a new cycle layout for the supercritical carbon dioxide with its better integration capabilities with heat sources for increased temperature difference across the receiver has been proposed and analyzed in the current study.
TL;DR: In this article , the authors presented a thermodynamic investigation on the configuration optimization of the ejector-enhanced auto-cascade refrigeration cycles for −80 °C freezers.
TL;DR: In this paper , a two-stage evaporation cycle with a common single-stage compressor is proposed, where an ejector is applied to lift the lower evaporic pressure up to the higher evaporization pressure or the compressor suction pressure.
TL;DR: In this article , the working principle of electrochemical hydrogen compression technology and its design development is discussed, and the focus is on research trends, recent advances, and transpired challenges, and future research directions are proposed.
TL;DR: In this paper , a vapor-injection transcritical CO2 heat pump system with a flash tank for electric vehicles was built up, and the heating and cooling performance in a wide range from −30 °C to 50 °C were experimentally studied.
TL;DR: In this paper , a novel hybrid propulsion system for unmanned aerial vehicles (UAVs) has been developed and optimized, which has two independent power generation sources which are the proton exchange membrane fuel cell (PEMFC) and a single-stage turbocharged engine.