Circulation of water

Acquisition of Solutes and Circulation of Water with Rocks, Atmosphere, and Biota... 

Water is omnipresent on the earth. Constant circulation of water from the ocean to the atmosphere (evaporation) and from the atmosphere to land and the oceans (precipitation, mnoff, etc) is generally known as the hydrologic cycle (see Fig. 1) (1 2). Within the hydrologic cycHc, there are several minor and local subcycles where water is used and returned to the environment. 

For small engines below 0.5 MW output, air-cooling can be considered. However, water-cooling by circulation of water through cylinder jackets is the method normally used for diesel generating plants. 

A mechanism of heat transfer in which heat energy is transmitted by convection current motion through gases and liquids. Part of the heat-transfer process in a boiler is by convection whereby the circulation of water carries heat from the tube near the fire to the drum and surrounding areas. 

The science dealing with the properties, distribution, and circulation of water. 

C. F.Jenner, Y. Xia. C. D. Eccles, P.T. Callaghan 1988, (Circulation of water within wheat grain revealed by nuclear magnetic resonance micro-imaging), Nature (London) 336, 399. 

Fig. 35 Purification test of the water of a circulation bath system using the circulation purifier (bath size 8 m3, users 200 persons/day, circulation of water 3 m3/h in the water-purifier, sampling directly from the bath)...

As the planet acquires a volatile molecule inventory it begins to develop an atmosphere, and in the case of the Earth this also includes the extensive circulation of water in the hydrosphere. The weight of the volatiles trapped in the atmosphere of a planet leads to a mean surface pressure, po, given by ... 

Atlantis Deep deposit, 17 690 Atmosphere. See also Air entries circulation of water with, 26 7-12 natural photocatalytic reactions in, 19 100... 

Biosynthetic patterns, of macrolide antibiotics, 15 305-306 Biota, circulation of water with, 26 7-12 Biotechnological manufacturing, key characteristics of, ll 440t Biotechnological membrane applications, 15 848... 

As for other types of fluid particle, the internal circulation of water drops in air depends on the accumulation of surface-active impurities at the interface (H9). Observed internal velocities are of order 1% of the terminal velocity (G4, P5), too small to affect drag detectably. Ryan (R6) examined the effect of surface tension reduction by surface-active agents on falling water drops. 

Hydrologic cycle The natural circulation of water throughout our planet. 

More realistic sketches of the cross section of a steam generator are in Figure 1.4. Part (a) of this figure illustrates the process of natural circulation of water between an upper steam drum and a lower drum provided for the accumulation and eventual blowdown of sediment. In some installations, pumped circulation of the water is advantageous. 

The water cycle is the continuous circulation of water within the Earth s hydrosphere. As water moves through the cycle, it changes state between liquid, solid, and gas phases. 

The circulation of water in the Arctic Basin is a complex system of cycles and currents with different scales. Block HB simulates the dynamics of Arctic Basin water by the system of sub-blocks presented in Figure 6.2. The water dynamics in 2 is presented by flows between compartments Eijk. The directions of water exchanges are represented on every level zk = z0 + (k — 1 )A k according to Aota et al. (1992) in conformity with the current maps assigned as SSMAE input. The external boundary of 2 is determined by the coastline, the sea bottom, the Bering Strait, the southern boundary of the Norwegian Sea, and the water-atmosphere interface. 

---