By W. P. Jones
Designed for college students engineers, the 5th version of this vintage textual content bargains with primary technology and layout rules of air con engineering platforms. W P Jones is an said specialist within the box, and he makes use of his adventure as a lecturer to provide the fabric in a logical and available demeanour, consistently introducing new innovations with using labored examples. This re-creation has been absolutely up to date take into consideration the most recent advancements in criteria, laws and expertise. The e-book contains contemporary examine on development strength administration structures and the most recent refrigerants. each one bankruptcy includes many examples, routines and extra studying permitting the reader to extend their wisdom via extra learn. ?·Keep updated with the newest criteria and technology?·Put thought into perform with examples and workouts plus details for additional reading?·New variation comprises fresh examine on development strength administration structures and the newest refrigerants
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Extra info for Air Conditioning Engineering, Fifth Edition
O. E h2 g3 g2 Dry-bulb temperature Fig. 2 The adiabatic mixing of two airstreams. Therefore gl - g3 g3 - g2 maz mal Similarly, making use of the principle of the conservation of energy, hi - h3 h3 - h2 ma2 mal From this it follows that the three state points must lie on a straight line in a massenergy co-ordinate system. The psychrometric chart published by the CIBSE is such a s y s t e m ~ w i t h oblique co-ordinates. For this chart then, a principle can be stated for the expression of mixture states.
1994): A review of CIBSE psychrometry, Building Serv. Eng. Res. Technol. 15, 4, 189-198. National Engineering Laboratory Steam Tables (1964): HMSO. NBS Circular 564 (1955): Tables of thermal properties of air, November. , 32. J, (1962): Thermal Environmental Engineering, Prentice-Hall, New York, p. 175 Bibliography l. A. Goff and S. Gratch, Thermodynamic properties of moist air, Trans. ASHVE, 1945, 51, 125. 2. H. McAdams, Heat Transmission, McGraw-Hill, 1942. 3. G. Kern, Process Heat Transfer, McGraw-Hill, 1950.
It might be thought that the increase of humidity would be such that the 'off' state, represented by the point B, would lie on the saturation curve. This is not so for the very good reason that no air washer or cooler coil is a hundred per cent efficient. It is unusual to speak of the efficiency of a cooler coil. Instead, the alternative terms, contact factor and by-pass factor, are used. 4) tc It is much less true to assume that they can also be written, without sensible error, in terms of wet-bulb temperature, since the scale of wet-bulb values on the psychrometric chart is not at all linear.
Air Conditioning Engineering, Fifth Edition by W. P. Jones