Results 1 to 10 of about 164,457 (185)

CFD Investigation on Movement Features of Hydrogen Bubble under Microgravity Environment

open access: yesEnergies, 2022
A designed cryogenic upper stage adopted liquid hydrogen and liquid oxygen (LH2/LO2) as an aerospace propellant. During a zero-gravity coast period in space, the wall heat leakage into the delivery tube could induce liquid propellant evaporation and two ...
Lei Wang   +5 more
doaj   +1 more source

A novel relaxation drift model for simulating liquid-vapor momentum non-equilibrium in two-phase ejectors

open access: yesCase Studies in Thermal Engineering, 2023
A novel relaxation drift model (RDM) was proposed to simulate the interphase momentum non-equilibrium (slip) inside two-phase work-recovery CO2 ejectors.
Junan Long   +5 more
doaj   +1 more source

Dynamic characteristics of an integrated cooling system comprising vapor compression and thermosyphon loop for electronics cooling

open access: yesCase Studies in Thermal Engineering, 2021
An integrated cooling system comprising passive cooling-thermosyphon loop and active cooling-vapor compression was proposed for the cooling of electronics, especially avionics, under a wide range of heat loads and ambient temperatures. A prototype of the
Weijian Chen   +4 more
doaj   +1 more source

Simulation of an improved solar absorption refrigeration system with phase change materials

open access: yesEnergy Reports, 2022
Aiming at the problems of low solar energy utilization rate, poor intermittent, low stability and poor energy saving effect in traditional solar absorption refrigeration system, a lithium bromide-water absorption refrigeration system driven by solar in ...
Hongzhi Zhu   +4 more
doaj   +1 more source

Performance comparison of cryogenic refrigeration system using LNG wasted cold and ammonia refrigeration

open access: yesShipin yu jixie, 2022
Objective: To compare the performance of cryogenic refrigeration system using LNG wasted cold and ammonia cooling. Methods: The thermodynamic and economic models of the two systems were established by MATLAB.
NING Jing-hong   +3 more
doaj   +1 more source

Research and Development of Carbon Dioxide Refrigeration Technology [PDF]

open access: yesE3S Web of Conferences, 2020
With the agreement of the Kigali amendment to the Montreal Protocol, the timetable for the reduction of the mandate and the limitation of 18 controlled substances are being phased in. This has brought great challenges to the transformation, upgrading and
Wang Qi, Li Guangpeng
doaj   +1 more source

Simulation Study on Solar Single/Double-Effect Switching LiBr-H2O Absorption Refrigeration System

open access: yesEnergies, 2023
In this study, a solar single/double-effect switching LiBr-H2O absorption refrigeration system was investigated to make full use of solar energy and give full play to the advantages of solar refrigeration systems.
Qingyang Li   +6 more
doaj   +1 more source

Numerical Investigation on Instability Flow Behaviors of Liquid Oxygen in a Feeding Pipeline with a Five-Way Spherical Cavity

open access: yesEnergies, 2020
The hydrodynamic information of liquid oxygen in the conveying pipeline of cryogenic launch vehicles directly determines the reliability of the operation of the turbopump.
Fushou Xie   +5 more
doaj   +1 more source

Performance Enhancement of Vapor Compression Refrigeration System using CuO Nano Particles in CARE 30 Test Rig [PDF]

open access: yesIranica Journal of Energy and Environment, 2020
The refrigeration system excution with the nano oil was explored to enhance the coefficient of performance (COP) of the vapor compression refrigeration system (VCRS) using CARE 30 which is a mixture of 50% refrigerant R200 and 50% refrigerant R600a in ...
M. Kaleemullah, H. Zahir, M. Azizuddin
doaj   +1 more source

Experimental Study of a Trans-Critical CO2 Mobile Air Conditioning System with an Ejector

open access: yesShanghai Jiaotong Daxue xuebao, 2021
A carbon dioxide(CO2) ejector expansion air conditioning system for vehicles is developed in a calorimeter laboratory. In experimental tests on a standard mobile air conditioning bench, the effects of different operating parameters on the performance of ...
LI Hao   +3 more
doaj   +1 more source

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