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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M-cycle, evaporative cooling, high efficiency, renewable energy, energy saving, low CO 2 emission Introduction Although conventional air-conditioning systems are widely accepted to be of high energy consumption, they cover a significant part of needs for air-conditioning. Published 6 March Volume By accessing the work you hereby accept the Terms. The replacement of conventional cooling systems by ones based on M-cycle amisotsenko to a significant environmental benefit, as:.

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 maisotesnko totally protected by moisture of supplying water.

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To evaluate the performance of an M-cycle—based device, a HMX of a nominal cooling capacity of 0. Indirect evaporative cooling of air to a sub wet-bulb temperature.

This work is published and licensed by Dove Medical Press Limited. This paper aims at describing in a simple way the M-cycle operation and utilization and at presenting some useful experimental data, to prove the high efficiency of M-cycle, under Mediterranean climate conditions.

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

The present paper deals with an overview of Maisotsenko cycle M-cycle. As the working stream passes through the wet channels, the water is evaporated and the required latent heat is absorbed by the dry channel, which becomes cooler and cooler Figure 3.

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. Some auxiliary devices fans and pump are needed to drive the air and the water into the cooler.

Several features of this site will not function whilst javascript is disabled. The efficiency does not depend on the ambient conditions, but the product stream temperature, which is to maieotsenko driven to the cooled space, is strongly affected by the humidity of the region where the cooler is installed.


Keeping the humidity ratio of product air constant, it succeeds in decreasing the air temperature down to ambient wet-bulb temperature and close to ambient dew-point dp temperature, by a smart heat and mass transfer procedure. When water evaporates and becomes vapor, the heat is removed from the air, resulting in a cooler air temperature.

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

If you agree to our use of cookies and the contents of our Privacy Policy please click ‘accept’. Usually, the evaporating cooler manufacturers give a typical value of hourly water consumption; however, this value does not take into account the cooler efficiency. ECs are based on water evaporation and latent heat utilization.

However, this method leads to a significant increase of specific water consumption. Int J Heat Mass Transf. Thus, the efficiency of the ECs is defined as the ratio of current to maximum possible temperature drop: If the working stream maaisotsenko is limited, the weakening of the evaporation so the temperature drop in the product stream is lower works cyclr an obstacle to the cooling capacity, but not as much as a limited product stream flow does.

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: On-site experimental maixotsenko of a novel dew point evaporative cooler. According to the maisotssenko configuration, the water evaporates into the air to be cooled; as a result, the product air is cold and wet.

There is no doubt about the effect of the reduction of the product stream flow on the improvement of the cooler efficiency. Thus, the payback period of an EC, compared to a conventional one, is about 2. In this paper, a cooler utilizing the M-cycle is analyzed; the aim was the production of dry and cool air with low electricity consumption only a simple axial fan of W consumes electricity and improvements of the cooler characteristics efficiency and water consumption.

Javascript is currently disabled in your browser. 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.


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.

And, as it is a quite new technology about 8 yearsits improvement potential in terms of electricity consumption is not negligible. Evaporation in an IEC is caused 1 by the sensible heat of the working stream and 2 by the sensible heat of the product stream. The specific water consumption of the cooler under normal mode varies under common ambient conditions between 2. The working stream passes through the perforations and is driven maisotswnko the wet channels blue lines, Figure 2.

An experimental study of novel dew-point evaporative cooling system. On the contrary, it fycle shown how disastrous a reduction of the working stream flow can be because the poor evaporation makes the cooler inefficient for significant temperature drops.

Although conventional air-conditioning systems are widely accepted to be of high energy consumption, they cover a significant part of needs for air-conditioning. Home Journals Why publish with us? On the contrary, some types of ECs produce an air stream of extremely high humidity sometimes, the stream is almost saturated and consume a significant amount of water. Figure 6 Experimental rig. An ideal EC would produce air as cool as the wet-bulb temperature, while a real cooler cannot reach such a low temperature.

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 system.

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

As the electricity cost is about 0. Modelling of indirect evaporative air coolers. Maisotsenko open cycle used for gas turbine power generation. The hotwire was placed in the center of each air duct, so as to measure the maisotsenlo velocity. Anisimov S, Pandelidis D. ECs based on M-cycle have been already installed to supply cool air to various applications domestic cooling, commercial and industrial buildings, etc.