Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1535 - 1547 |
| Number of pages | 13 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 47 |
| Issue number | 6-7 |
| DOIs | |
| Publication status | Published - 2004 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- heat exchangers
- heat flows
- heat flux
- heat transfer
- preheat
- fluidized beds
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Heat exchange between two coupled moving beds by fluid flow. / Saastamoinen, Jaakko.
In: International Journal of Heat and Mass Transfer, Vol. 47, No. 6-7, 2004, p. 1535 - 1547.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Heat exchange between two coupled moving beds by fluid flow
AU - Saastamoinen, Jaakko
N1 - Project code: C0SU00276
PY - 2004
Y1 - 2004
N2 - Heat exchange between a moving bed and fluid flow is considered. The arrangement of flows of fluid and solids can be in parallel flow, counter-flow or cross-flow. The effect of possible phase change is considered using a simplified model. Heat exchange by forced fluid flow between two coupled moving beds containing solids can be used to recover heat from hot products to cool input in many industrial processes. There are several ways to couple such two moving beds. Analytical solutions for the fluid and solid temperature distributions and heat recovery effectiveness are presented for continuous operation for single moving beds and two beds coupled by a fluid flow. The intra-particle transient temperature distributions are accounted for in the more accurate analysis and the results are compared to lumped analysis and an approximate solution. The heat recovery effectiveness of a coupled system reaches maximum at certain optimum flow rate of the fluid. Analogy between regenerators and heat recovery systems consisting of two moving beds coupled by an unmixed flow of fluid is found. Due to this analogy many different calculation methods, tables and formulas developed for to evaluate temperatures and thermal effectiveness of regenerators can be used to study heat recovery from solids.
AB - Heat exchange between a moving bed and fluid flow is considered. The arrangement of flows of fluid and solids can be in parallel flow, counter-flow or cross-flow. The effect of possible phase change is considered using a simplified model. Heat exchange by forced fluid flow between two coupled moving beds containing solids can be used to recover heat from hot products to cool input in many industrial processes. There are several ways to couple such two moving beds. Analytical solutions for the fluid and solid temperature distributions and heat recovery effectiveness are presented for continuous operation for single moving beds and two beds coupled by a fluid flow. The intra-particle transient temperature distributions are accounted for in the more accurate analysis and the results are compared to lumped analysis and an approximate solution. The heat recovery effectiveness of a coupled system reaches maximum at certain optimum flow rate of the fluid. Analogy between regenerators and heat recovery systems consisting of two moving beds coupled by an unmixed flow of fluid is found. Due to this analogy many different calculation methods, tables and formulas developed for to evaluate temperatures and thermal effectiveness of regenerators can be used to study heat recovery from solids.
KW - heat exchangers
KW - heat flows
KW - heat flux
KW - heat transfer
KW - preheat
KW - fluidized beds
U2 - 10.1016/j.ijheatmasstransfer.2003.10.011
DO - 10.1016/j.ijheatmasstransfer.2003.10.011
M3 - Article
VL - 47
SP - 1535
EP - 1547
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
IS - 6-7
ER -