Maisotsenko Cycle for Cooling Processes

Abstract

The Maisotsenko Cooling cycle combines the thermodynamic processes of heat exchange and evaporative cooling in a unique indirect evaporative cooler resulting in product temperatures that approach the dew point temperature (not the wet bulb temperature) of the working gas. This cycle utilizes the enthalpy difference of a gas, such as air, at its dew point temperature and the same gas saturated at a higher temperature. This enthalpy difference or potential energy is used to reject the heat from the product. Consider the cooling gas to be air and the liquid to be water; the Maisotsenko Cycle allows the product fluid to be cooled in temperature ideally to the dew point temperature of the incoming air. This is due to the precooling of the air before passing it into the heatrejection stream where water is evaporated. For purposes of this paper, the product fluid is air. At no time is water evaporated into the product airstream. When exhausted, the heat rejection airstream or exhaust air is saturated and has a temperature less than the incoming air, but greater then the wet bulb temperature. This cycle is realized in a single apparatus with a much higher heat flux and lower pressure drop than has been realizable in the past due to its efficient design.

A novel approach using predictive models for performance analysis of desiccant enhanced evaporative cooling systems

“…The DEVAP system, which was investigated in this paper, utilizes specific and successful types of IEC, called Maitsosenko IEC known also as the M-cycle [5,6,14]. This type of IEC includes respectively.…”

“…This system consists of two major parts: the first part is a liquid desiccant device for removing moisture in the dehumidifier, and the second part is the indirect evaporative air cooling system for removing sensible heat. Both parts have been enhanced in recent years by the usage of the fully efficient liquid desiccants, lowering energy consumption, regenerating the desiccant with low quality energy sources (waste heat or solarenergy [3]), and also employing a portion of cooled air, or return air, as the working fluid for the second part [4][5][6]. 4 …”

Comparison study of the counter-flow regenerative evaporative heat exchangers with numerical methods

“…6(a) and (b) (constant inlet temperature and humidity ratio, variable air flow velocity) and in Fig 6 (c)-(f) (constant air flow velocity, variable inlet temperature and humidity ratio). Equation (14) was used to calculate the discrepancies (this method was used in other studies connected with indirect evaporative air cooling, e.g. [22]).…”

Assessment of Maisotsenko Combustion Turbine Cycle with Compressor Inlet Cooler

“…So there is a new developed technology named the Maisotsenko cycle (M-cycle) that can be a solution for limitations of the HAT cycle [2]. M-Cycle systems are commonly known with air conditioning systems, and this cycle includes the wet and dry sides of a plate similar to indirect evaporative coolers, but with a much different airflow creating a new thermodynamic cycle resulting in product temperatures which approach the dew point temperature of the air [4]. The enthalpy difference of the air at the dew point temperature and the air saturated at a higher temperature to reject the heat from the product is used in this M-cycle.…”