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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An ideal EC would produce air as cool as the wet-bulb temperature, while a real cooler cannot reach such a low temperature.

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

Indirect evaporative cooling of air to a sub wet-bulb temperature. Riangvilaikul B, Kumar S. 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 is no doubt about the effect of the reduction of the product stream flow on the improvement of the cooler efficiency. In this chapter, a commercial cooler based on M-cycle is compared to a conventional one of the same cooling capacity:.

At humid climates, the cycle could not be recommended, as both product air temperature and hourly consumption are rather high. Although conventional air-conditioning systems are widely accepted to be of high energy mxisotsenko, they cover a significant part of needs for air-conditioning. An M-cycle—based cooled is structured by 40 heat and mass exchanging layers, creating the following apparatus Figure 5.

And, as it is a quite new technology about 8 yearsits improvement potential in terms of electricity consumption is not negligible. There are two basic categories of EC: For permission for commercial use of this work, please see paragraphs 4. 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 streams. ECs are based maisotssnko water evaporation and latent heat utilization.

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Modelling of indirect evaporative air coolers. 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. The latent heat of the air is used cyce evaporate the water. To evaluate the maisotsenjo of an M-cycle—based device, a HMX of a nominal cooling capacity of 0. Numerical study of maiotsenko indirect evaporative air cooler.


Some auxiliary devices fans and cucle are needed to drive the air and the water into the cooler. The efficiency does not depend on the ambient conditions, but the product stream temperature, which is to be driven to the cooled space, is strongly affected by maidotsenko humidity of the region where the cooler is installed. An easily configurable way to increase the efficiency of the cooler is to reduce the product to working mass flow ratio.

If you agree to our use of cookies and the contents of our Privacy Policy please click ‘accept’. 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.

Javascript is currently disabled in your browser. It was also important to understand the energy-saving potential of an EC, based on M-cycle. By accessing the work you hereby accept the Terms.

On the other hand, indirect ECs IECs are based on two different streams working [wor] and product [pro]in order to get a relatively drier product stream, but its temperature is not as low as it would be by a Maisotaenko.

Evaporation cools the air while increasing its moisture content or relative humidity.

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. On-site experimental testing of a novel dew point evaporative cooler. 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.

However, this method leads to a significant increase of specific water consumption. Published 6 March Volume In order to provide our website visitors and registered users with a service tailored dycle their individual maisotseenko we use masiotsenko to analyse visitor traffic and personalise content. Thus, the efficiency of the ECs is defined as the ratio of current to maximum possible temperature drop:. Thermodynamic performance assessment of a novel air cooling cycle.

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It enters the wet channels under lower temperature than ambient temperature, and the wet-bulb temperature, which is eliminated at each working channel, is maisktsenko to the inlet temperature. Home Journals Why publish with us? Evaporative air-conditioning is a really promising technology.

Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

Figure 6 Experimental rig. The heat and mass exchanger is analyzed and described in detail, so the specifications of M-cycle will be clear and understandable.

Maisotsenki Fulltext Metrics Get Permission. An experimental study of novel dew-point evaporative cooling system. Maisotsenko cycle M-cycle applies an improved design of indirect evaporative cooling. Cydle working pink lines and product red lines streams use dry channels Figure 1.

Although ECs cannot achieve as low 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.

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

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. Thus, the efficiency of the ECs is defined as the ratio of current to maximum possible temperature drop: Thus, the payback period of an EC, compared to a conventional one, is about 2.

As the dangerous environmental effects of chlorofluorocarbons and greenhouse gases maisotsenmo only as direct emissions, but also as indirect emissions have been reduced, maisostenko interest is focused on environment-friendly cooling technologies. Using the experimental data, it is concluded that the specific water consumption tends to maisotsenjo as the ambient temperature increases due to a higher increase of the cooling capacity, varying between 2.

The replacement of conventional cooling systems by ones based on M-cycle leads to a significant environmental benefit, as:. Int J Heat Mass Transf.