COMPARATIVE ANALYSIS ОF DIFFERENT PLANTS UTILIZING COLD ENERGY OF LIQUID NATURAL GAS

This article deals with comparative analysis of the energy plants, utilizing cold energy of liquid natural gas. Comparative analysis require development of certain criteria which must take into account generated energy, degree of liquid natural gas cold energy utilization etc. Analysis shows that one of the most effective ways to utilize cold energy is thermal compression

OPTIMIZATION OF THE THERMODYNAMIC CYCLE OF ENERGY PLANTS UTILIZING COLD ENERGY OF LIQUID NATURAL GAS

This article deals with parametric optimization of low-potential energy plant utilizing cold energy of liquid natural gas. Power plant with Rankine cycle and carbon dioxide was selected for optimization. Optimization shows that optimal pressure ration is 5.5 and COP of such plant is equal to 16%

Calculation Methodology of Power Plant Universal Cycle Using Low-grade Heat of Refrigerant

The problems of high energy loss exists in many industries and in many technological processes. The problem of not effective use of the energy potential of the refrigerants is the main problem, because the refrigerant loses its potential and the potential energy at the regasification upon receipt of the liquefied natural gas. Solution of this problem is using low-grade heat of the refrigerant. This investigation describes the creation of a design procedure of the installation of the cycle that uses low-grade heat of the refrigerant. The cycle that uses low-grade heat of the refrigerant has been described and calculation method has been developed

Numerical Modelling of Evaporation Process in Cryogenic Systems

This article deals with a problem of evaporation numerical modeling in cryogenic systems of constant volume. Particularly, a method of nitrogen evaporation modeling in cryogenic fueling tank was considered. User-defined functions of nitrogen thermodynamic properties in temperature range of 70…400 K and pressure range of 0.1…30 MPa. The result of this research is calculation algorithm which allows to model processes of phase change in cryogenic systems with constant volume. A comparison obtained between results of numerical modeling with experimental and analytical data is presented. Deviation of results from experimental data is 5-10%

Numerical Modelling of Evaporation Process in Cryogenic Systems

This article deals with a problem of evaporation numerical modeling in cryogenic systems of constant volume. Particularly, a method of nitrogen evaporation modeling in cryogenic fueling tank was considered. User-defined functions of nitrogen thermodynamic properties in temperature range of 70…400 K and pressure range of 0.1…30 MPa. The result of this research is calculation algorithm which allows to model processes of phase change in cryogenic systems with constant volume. A comparison obtained between results of numerical modeling with experimental and analytical data is presented. Deviation of results from experimental data is 5-10%

The Vortex Aircooler System for Cutting Materials in Aerospace Industry

In aerospace industry there is a situation, when it is not possible to use liquid cooling of cutting zone, because we have special material or special construction. How often in that case used air fluent, but it has some problems with life cycle tools, quality and cutting time. For solving these problems was use the vortex effect, it was open less than one hundred years ago. The unit for making vortex effect is could vortex tube. It was done the design the vortex tube of air cooler system for cutting using some researching [1-5]. Some experimental dates gave verification. The construction was made by metal materials and now is using on JSC «Salut», Samara.