ISSN:0145-7632    

DOI:10.1080/01457638108939570

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The basic criteria are derived in determining whether the heat transfer relationship for a given heat exchanger geometry is invariant to the interchanging of shell-side and tube-side fluids. It is shown that the total heat duty, LMTD correction factor, and other indices of exchanger performance remain unchanged for a stream-symmetric exchanger when the two flow streams are switched, provided the overall heat transfer coefficient is not changed.

ISSN:0145-7632    

DOI:10.1080/01457638108939571

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

In heat exchange equipment, fouling biofilm formation causes a significant energy loss by increasing heat transfer resistance. This paper describes experiments which quantify the influence of fouling biofilms on heat transfer resistance under controlled laboratory conditions. Experimental results compare well with a rather simple mathematical model employing friction factor, biofilm thickness, wall temperature, bulk temperature, and fluid properties as inputs. Limitations of the experimental apparatus and mathematical model are discussed

ISSN:0145-7632    

DOI:10.1080/01457638108939572

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Tests are described on a pilot plant simulating an air-cooled heat exchanger that can be operated in both the induced-draft and forced-draft modes. Heat transfer coefficients in the induced-draft mode were well correlated, for greater than six rows, by the Briggs and Young correlation; for smaller numbers of rows, a new correlation is presented. In the forced-draft mode, however, none of the literature correlations fit the data and two new correlations (for more than six rows and for less than six rows, respectively) are presented. Data were also obtained for pressure drop and these are compared with existing correlations. Two new pressure-drop correlations are presented for the forced-draft mode.

ISSN:0145-7632    

DOI:10.1080/01457638108939573

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

This article examines the design of multizone condensers. It also marks the first published discussion of the existence of a “wet desuperheating zon” in every multizone condenser with a “dry desuperheating zone. ’Considered in this discussion are only single component vapors in shell-and-tube heat exchangers with single shell-side pass

ISSN:0145-7632    

DOI:10.1080/01457638108939574

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

ISSN:0145-7632    

DOI:10.1080/01457638108939575

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor