Abstract
The present paper represents the second part of the serial publication, which deals with convective and radiative heat transfers in buildings. The algebraic computational method for combined convective-radiative heat transport in buildings has been proposed. The convective transport of heat has been formulated by means of the correlation functions of the Nusselt number. The radiative heat transfer has been specified by using the radiosity method explained in the first part of the serial publication. The system of transcendent equations has been formed to couple the convective and radiative heat transports. The transcendent system has been solved iteratively, which has facilitated to obtain the optimized surface temperatures as well as the optimized values of the coefficients of heat transfer. On the basis of these optimized values, a more precise overall heat loss has been computed and compared with the results obtained from the thermal standard. The strong and weak points of the both used numerical methods have been discussed.
Highlights
The present paper continues the previous contribution entitled General model of radiative and convective heat transfer in buildings: Part I: Algebraic model of radiative heat transfer [1]
This method will be used in the present paper in combination with convective methods so that the heat losses of buildings may be assessed more rigorously
The heat transfer in closed spaces may consist of conduction, convection and radiation. These transports compensate heat losses going through building envelopes but they may influence the temperatures of interior surfaces that occasionally suffer from the condensation of water vapours
Summary
The present paper continues the previous contribution entitled General model of radiative and convective heat transfer in buildings: Part I: Algebraic model of radiative heat transfer [1]. It will be instructive to specify such cases This will be illustrated in the following introductory paragraphs by comparing effectiveness of heat radiation with other two transfer mechanisms within large and small enclosures. The radiation transmits more than 78.5 % of the heat energy whereas conduction and convection only 21.5 % within the tested room of a common height 2.8 m between the floor and the ceiling. Such room represents a typical room of a family house. The convective contributions in such spaces cannot be neglected, too For this reason, the discussion should be aimed at the radiative and convective heat transfers. Since the radiative transfer was thoroughly discussed in the preceding contribution [1], the convective transport is the subject of the central interest
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
