| Title |
A Study on the Heat and Mass Transfer in an Enthalpy Exchanger Made of Functional Polymer |
| DOI |
https://doi.org/10.6110/KJACR.2018.30.10.479 |
| Keywords |
기능성 폴리머 ; 전열교환소자 ; 환기 ; 열 및 물질전달 ; 전열회수 환기장치 Functional polymer ; Enthalpy exchanger ; Ventilation ; Heat and mass transfer ; ERV |
| Abstract |
Enthalpy exchangers are commonly made of paper material, and there exists a continuous concern on mold growth, dew condensation, etc. The concern may be mitigated if moisture transferable polymers are used instead of paper. In this study, an enthalpy exchanger is made of polymer membrane with dual layers of polyvinylidene fluoride and cellulose, and heat and moisture transfer tests were conducted. For the polymer membrane, polyvinylidene fluoride acts as a gas barrier, and cellulose acts as support. Tests were also conducted on enthalpy exchangers made of paper for comparison purpose. Two paper exchangers were made-one with spacer of pure pulp, and the other with spacers impregnated with LiCl. Results revealed temperature efficiencies were almost identical independent of raw material. The polymer exchanger yielded higher humidity efficiency than the paper exchanger with spacers of pure pulp at the cooling condition. At the heating condition, they were approximately the same. The paper exchanger with spacers impregnated with LiCl yielded highest humidity efficiency among the three, due to absorption of moisture by the spacers. LiCl impregnation increased moisture efficiency by 31.2% at the cooling condition and by 35.5% at the heating condition. |