INVESTIGATION OF TWISTED TAPE TURBULATOR FOR FIRE TUBE BOILER Part I. Heat Transfer

Karima E. Amori; Rashid K. Insayif

doi:10.31026/j.eng.2011.04.06

Article Details

INVESTIGATION OF TWISTED TAPE TURBULATOR FOR FIRE TUBE BOILER Part I. Heat Transfer

Authors:

Karima E. Amori | Rashid K. Insayif

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.17 Issue 4, pp.694-713

Document Type:

Article

Publication Date:

1/2011

Document Language:

English

Document ID (Org No.):

2001380396

pISSN:

2520-3339

DOI:

10.31026/j.eng.2011.04.06

Keywords:

Abstract:

 The present work presents a new experimental study of the enhancement of turbulentconvection heat transfer inside tubes for combined thermal and hydrodynamic entry length of onepopular “turbulator” (twisted tape with width slightly less than internal tube diameter) inserted forfire tube boilers. Cylindrical combustion chamber was used to burn (1.6 to 7kg/h) fuel oil #2 todeliver hot gases with ranges of Reynolds number (10500 to 21700), and (11400 to 24150) for bothempty and inserted tube respectively.A uniform wall temperature technique was used by keepingapproximately constant water temperature difference (25ºC) between inlet and exit cooling water inparallel flow shell and tube heat exchanger. The test tube consisted of smooth carbon steel tube of(2400mm) long and (52mm) internal diameter. This test tube instrumented to derive local heattransfer coefficient and local flue gasses static pressure.The experimental results show that for thesame fuel consumption, twisted tape insert with (H/D = 11.15) enhanced the mean Nusselt numberin (75.2%), (68.8%), (49.8%), (40.3%), and (16.7%) for fuel consumption (7kg/h), (6.16kg/h),(4.5kg/h), (3.24kg/h), and (1.6kg/h) respectively.A set of empirical correlations that permit theevaluation of the mean Nusselt number (for developing and fully developed region), and averageNusselt number (for developed region) for empty and inserted tube are generated for engineeringapplications.

Article Details

INVESTIGATION OF TWISTED TAPE TURBULATOR FOR FIRE TUBE BOILER Part I. Heat Transfer

Authors:

Karima E. Amori | Rashid K. Insayif

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.17 Issue 4, pp.694-713

Document Type:

Article

Publication Date:

1/2011

Document Language:

English

Document ID (Org No.):

2001380396

pISSN:

2520-3339

DOI:

10.31026/j.eng.2011.04.06

fire tube boiler

twisted tape

heat transfer enhancement

Issues

Article Details

INVESTIGATION OF TWISTED TAPE TURBULATOR FOR FIRE TUBE BOILER Part I. Heat Transfer

Authors: Karima E. Amori | Rashid K. Insayif

Publisher: University of Baghdad

Journal: Journal of Engineering Vol.17 Issue 4, pp.694-713

Document Type: Article

Publication Date: 1/2011

Document Language: English

Document ID (Org No.): 2001380396

pISSN: 2520-3339

DOI: 10.31026/j.eng.2011.04.06

fire tube boiler

twisted tape

heat transfer enhancement

Issues

Authors:

Karima E. Amori | Rashid K. Insayif

Publisher:

University of Baghdad

Journal:

Journal of Engineering Vol.17 Issue 4, pp.694-713

Document Type:

Article

Publication Date:

1/2011

Document Language:

English

Document ID (Org No.):

2001380396

pISSN:

2520-3339

DOI:

10.31026/j.eng.2011.04.06