Life below the wet bulb: The Maisotsenko cycle. Today’s combined-cycle power plants are attaining efficiencies near 50%. But a new technology promises levels . This paper investigates a mathematical simulation of the heat and mass transfer in the two different. Maisotsenko Cycle (M-Cycle) heat and mass exchangers. Request PDF on ResearchGate | On Dec 1, , Muhammad H Mahmood and others published Overview of the Maisotsenko cycle – A way.

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Substantial energy, no chlorofluorocarbon usage, reduced peak demand, reduced CO 2 and power plant emissions, improved indoor air quality, lifecycle, cost effectiveness, easily integrated into built-up systems, and easy to use with direct digital control are the main advantages of ECs. There are two basic categories of EC: The achievement of this geometry is the high efficiency of the cycle, as it produces cold air of temperature lower than the wet-bulb ambient air temperature.

Home Journals Why publish with us? Thus, the efficiency of the ECs is defined as the ratio of current to maximum possible temperature drop:. Usually, the evaporating cooler manufacturers give a typical value of hourly water consumption; however, this value does not take into account the cooler efficiency.

The study is to be a useful tool to anyone interested in energy saving in buildings and in industrial plants, as the operating cost, which is strongly affected by the cooling demand, is significantly reduced by the application of M-cycle. Maisotsenko open cycle used for gas turbine power generation. The working stream passes through the perforations and is driven to the wet channels blue lines, Figure 2.

[Full text] Maisotsenko cycle: technology overview and energy-saving potential in | EECT

The specific water consumption of the cooler under normal mode varies under common ambient conditions between 2. The latent heat of the air is used to evaporate the water. Some auxiliary devices fans and pump are needed to drive the air and the water into the cooler.


If the working stream flow is limited, the weakening of the evaporation so the temperature drop in the product stream is lower works as an obstacle to the cooling capacity, but not as much as a limited product stream flow does.

M-cycle, evaporative cooling, high efficiency, renewable energy, energy saving, low CO 2 emission. It enters the wet channels under lower temperature than ambient temperature, and the wet-bulb temperature, which is eliminated at each working channel, is related to the inlet temperature.

No heat is added or taken out of the air; thus, it is an adiabatic process of constant enthalpy.

This cycle is an indirect evaporative cooling—based cycle, cycel utilizes a smart geometrical configuration for the air distribution. Indirect evaporative cooling of air to a sub wet-bulb temperature.

Maisotsenko cycle: technology overview and energy-saving potential in cooling systems

As the dangerous environmental effects of chlorofluorocarbons and greenhouse gases not only as direct emissions, but also as indirect emissions have been reduced, the interest is focused on environment-friendly cooling technologies. Although ECs cannot achieve as maisotwenko temperature as their users want due to the dew-point temperature restrictionM-cycle is the most effective IEC, the product air of which tends to the outlet air temperature of conventional building air-conditioning systems.

At humid climates, the cycle could not be recommended, as both product air temperature and hourly consumption are rather high. Even then, in this case, the efficiency is comparable to that of DECs, even without producing humid air like these and almost double the efficiency of typical indirect evaporative systems.

Finally, the energy-saving potential is estimated in conventional cooling systems, in terms of electricity and capital cost, in order to evaluate the financial benefit of M-cycle application: A heat exchange layer is used between the working airstream and the supply airstream, because the ambient wet-bulb wb temperature is theoretically the minimum achievable temperature of a conventional evaporative maisitsenko.

Thus, the efficiency of the ECs is defined as the ratio of current to maximum possible temperature drop: Paper sheets of a special type, for optimum wetting and mass transfer between them and the air, are used as exchange layers, while the product air which is to cool the air-conditioning spaces is totally protected by moisture of supplying water. The fan draws in warm and dry ambient air through the wet blocks, cooling it.


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M-cycle has been designed to optimize the effectiveness of both stages of evaporation direct evaporation of working stream and heat exchange between streams.

Javascript is currently disabled in your browser. An M-cycle—based cooled is structured by 40 heat and mass exchanging layers, creating the following apparatus Figure 5. The increased amount of heat inserted in the cooler, when the ambient air is hotter, reinforces the evaporation phenomenon, as already mentioned, resulting in higher temperature drops through the cooler. Int J Energy Clean Environ. It is clear that, because the two currents do not interact, any water addition will not affect the product stream and its contribution to the increase of the latent heat, which causes evaporation, is linked to the temperature difference of the two streams.

An ideal EC would produce air as cool as the wet-bulb temperature, while a real cooler cannot reach such a low temperature. Ignoring the rates of return, it is clear that maisosenko about 6, hours of operation Figure 7the increased cost of installation of an EC balances the increased cost of operation of an conventional cooler. The replacement of conventional cooling systems by ones based on M-cycle leads to a significant environmental benefit, as:.

Published 6 March Volume Several features of this site will not function whilst javascript is disabled. For permission for commercial use of this work, please see paragraphs 4.