Maisotsenko cycle applications for multistage compressors cooling

Abstract

Abstract. The present study provides the overview of Maisotsenko Cycle (M-Cycle) applications for gas cooling in compressor systems. Various schemes of gas cooling systems are considered regarding to their thermal efficiency and cooling capacity. Preliminary calculation of M-cycle HMX has been conducted. It is found that M-cycle HMX scheme allows to brake the limit of the ambient wet bulb temperature for evaporative cooling. It has demonstrated that a compact integrated heat and moisture exchange process can cool product fluid to the level below the ambient wet bulb temperature, even to the level of dew point temperature of the incoming air with substantially lower water and energy consumption requirements. IntroductionGas compression and transportation is one of the most energy consuming technologies in the world. Compressors are a vital link in the conversion of raw materials into refined products. Compressors also handle economical use and transformation of energy from one form into another. They are used for the extraction of metals and minerals in mining operations, for the conservation of energy in natural gas reinjection plants, for secondary recovery processes in oil fields, for the utilization of new energy sources such as shale oil and tar sands, for furnishing utility or reaction air, for oxygen and reaction gases in almost any process, for process chemical and petrochemical plants, and for the separation and liquefaction of gases in air separation plants and in LPG and LNG plants. The economy and feasibility of all these applications depend on the reliability of compressors and the capability of the compressors selected to handle a given gas at the desired capacity [1]. Since, value of specific work for all compressors is determined by several factors as: specific heat ratio k, specific gas constant R, pressure ratio  and inlet temperature T in . As a rule, all the enumerated factors except the inlet temperature are defined by the initial conditions and/or performance specification for the designed compressor. That is why inlet temperature reduction remains the most feasible way to reduce compressors' specific work.There are a lot of approaches to reduce T in value (depending on the place of cooling):

Potential of Indirect Regenerative Evaporative Cooling System (M-Cycle) for Electronic Applications

“…The classical thermodynamic cooling system based on the Maisotsenko cycle consists of two air channels, usually called dry and wet channels (DC and WC) [1][2][3]. The incoming air is cooled in dry channels (DC) due to intense evaporation process that occurs behind the adjacent wall in wet channels (WC).…”

Comparative Exergy Analysis of Units for the Porous Ammonium Nitrate Granulation

“…For example, the use of recuperators in which one or several heat carriers is transformed (condensed, evaporated, or boiled) can significantly increase the efficiency of the heat recovery process (according to the results of experimental studies GTI-Maisotsenko-Cycle Based Humidified Air Recuperator (HAR) and Water Heater Validation). For example, new thermodynamic principles for air-evaporative cooling of a large amount of heat carrier in cooling towers will provide a significant economic effect [24] (GTI-Method and apparatus for dew point evaporative product cooling). Besides, new materials and coating can be used to achieve these indicators and reach a new qualitative equipment level.…”

“…In the chemical industry, which simultaneously can use many flows with various substances with different thermal and caloric parameters, it is essential to ensure the most complete and positive effect of some processes on others. So, for example, in the utilization ejector module for the granulation scheme of porous ammonium nitrate [24,28], in addition to the nitrogen oxides conversion into higher oxides (the main effect), there is a significant inflow of thermal energy (secondary energy resource), which can and should be used (heating, drying, humidification, electricity generation [29,30]) for the needs of their chemical production or related enterprises/workshops or the population. It is advisable to organize a staged heat removal and recuperation since it will let more efficiently distribute energy between its consumers to ensure the available secondary energy resources use.…”