Spraying cooling system

Specimen Location Main supply line to spray cooling system... 

Elgawhary, A. W. Chem. Eng. Progr., 71(7) (1975) 83. Spray cooling system design. 

Air-Vapor Dynamics in Large-Scale Atmospheric Spray Cooling Systems... 

Heat Transfer/Cooling Towers. . . Spray Cooling System Design Elgawhary, A. W. 

Such a mechanism of functioning of a spraying cooling system was not however highlighted in the available literature. American researchers [114, 118] were the first who made attempt to estimate a decrease of the SCS cooling efficiency along the wind. Another attempt to perform an even more detailed SCS study was done in the Institute of Hydromechanics of NASU (Kyiv, Ukraine) by Gayev e.a [209]—[217]. A real... 

Figure 1.14 Typical distributions of wind velocity (A) and air temperature and humidity (B) within and above the spraying cooling system.

The spraying cooling systems are another example of a canopy , for which one needs to know not only the flow transformation but also the transformation of the canopy itself. A suggestion was made in Section 1.4 to treat air as a continuous carrier medium and the droplets as another continuous medium being carried by the first one. Several relevant mathematical models for such droplet EPR are studied in this chapter. 

The easily penetrable roughness made up of mobile elements is a heuristic model of the spraying cooling system (SCS). Therefore, it is important to consider the heat and mass exchange of such an EPR with the flowing medium (air in the case of SCS). Droplets are cooled by the wind, and this ultimate aim is practically important for power plant engineers. 

Laboratory modeling and theoretical investigations of an abstract easily penetrable roughness, as well as the in-situ measurements overviewed in Section 1.4, were carried out to perform a real object, an extended spraying cooling system for a project of the Zaporizhzhya nuclear power plant shown in Fig. 1.12. The interpretation of its droplet layer as an EPR was done in Section 1.4. It is the aim of this section to briefly present the main results of a one-dimensional theory. 

From an engineering point of view, the spraying cooling system (SCS) is determined by two groups of factors. Environmental factors determined by meteorological measurements include... 

Chaturvedi, S., and Porter, R.W. (1978) Air-vapor dynamics in large-scale atmospheric spray cooling systems. Trans. ASME, J. Fluid Engineering v. 100, N 1, 65-72. 

Gayev, Ye.A. (1987) Heat performance method for largescale spraying cooling systems, Promishlennaya teplotekhnicka, Kiev, 9, N 4. (in Russian). 

This simple criterion based on the least irreversibility is technically interesting for choosing the most adequate fluid in the optimal design of a certain spray-cooling application. It should be stressed that the optimal wall temperature corresponds to the working temperature of the heat-dissipating surface, which the spray-cooling system is required to maintain at a constant value. 

When designing a spray-cooling system, the optimization analysis should consider the relative importance of each term in (21.7) to the irreversibility distribution ratio sc. 

R. S. Sheinson, B. Borman, A. Maranghides, R. Anleitner, P. Gunning Use of water spray cooling systems in conjunction with HFP (HFC-227ea) to protect shipboard flammable liquid storage rooms, Proc. Halon Options Technical Working Conf., Albuquerque, pp. 447-456 (2001). 

PTC 23 Atmospheric Water Cooling Equipment Jack H. Karian (212) 591-8552 PTC 23.1 Spray Cooling Systems... 

---