Analysis of the convective heat transfer and equivalent thermal conductivity of functional paper honeycomb wall plates

For the development of functional honeycomb plates (FHPs) and efficient resource utilization of straw, based on the measurement of the equivalent thermal conductivity (λ E ) of paper honeycomb plates (HPs) and FHPs, including straw-core paper honeycomb plates (SHPs), under cold-left and hot-right co...

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Bibliographic Details
Published in:Experimental heat transfer 2022-07, Vol.35 (5), p.577-590
Main Authors: Yang, Jing, Guo, ZhenSheng, Chen, JinXiang, He, ChaoChao
Format: Article
Language:English
Subjects:
beetle elytron plate
Beetles
Building envelopes
Conduction heating
Conductive heat transfer
Convective heat transfer
Equivalence
Fillers
Heat conductivity
Heat transfer
Honeycomb plate
Insulation
Plates
Radiative heat transfer
Resource utilization
straw wall
Thermal conductivity
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Summary:For the development of functional honeycomb plates (FHPs) and efficient resource utilization of straw, based on the measurement of the equivalent thermal conductivity (λ E ) of paper honeycomb plates (HPs) and FHPs, including straw-core paper honeycomb plates (SHPs), under cold-left and hot-right conditions, the influence mechanism of the system geometry parameters on the convective heat transfer of HPs and the heat insulation performance of FHPs by fillers are discussed. The results are as follows. 1) Compared with the case of hot-above and cold-below conditions, the convective heat transfer ratio of HP increases substantially under cold-left and hot-right conditions. 2) The main heat transfer modes of the FHPs are radiative heat transfer between the wall (including the panel and side) and filling material and solid heat conduction in the filling material, supplemented by a small amount of heat conduction through air or local convection heat transfer in the void. 3) The higher the temperature is, the greater the FHP equivalent thermal conductivity, with little influence from the heat transfer direction. 4) It is relatively conservative to use the heat transfer effect of HPs and FHPs to evaluate that of beetle elytron plates (BEPs) and functional beetle elytron plates (FBEPs). This study lays a foundation for the application of multifunctional BEPs and HPs in building envelopes.
ISSN:0891-6152
1521-0480
DOI:10.1080/08916152.2021.1919246