Browsing by Author "Ho, C. J."

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Colossal electroresistance and colossal magnetoresistance in spinel multiferroic CdCr(2)S(4)
(2010-03-22)
Sun, C. P.
;
Huang, C. L.
;
Lin, C. C.
;
Her, J. L.
;
Ho, C. J.
Colossal magnetoresistance (CMR) and colossal electroresistance (CER) induced by the electric field in spinel multiferroic CdCr(2)S(4) are reported. It is found that a metal-insulator transition in CdCr(2)S(4) is triggered by the electrical field. In magnetic fields, the resistivity rho of CdCr(2)S(4) responds similarly to that of CMR manganites. Combing previous reports, these findings make CdCr(2)S(4) the unique compound to possess all four properties of the colossal magnetocapacitive, colossal electrocapacitive, CER, and CMR. The present results open a new venue for searching new materials to show CMR by tuning electric and magnetic fields.
Colossal electroresistance and colossal magnetoresistance in spinel multiferroic CdCr2S4
(2010-03-22)
Sun, C. P.
;
Huang, C. L.
;
Lin, C. C.
;
Her, J. L.
;
Ho, C. J.
Colossal magnetoresistance (CMR) and colossal electroresistance (CER) induced by the electric field in spinel multiferroic CdCr2S4 are reported. It is found that a metal-insulator transition in CdCr2S4 is triggered by the electrical field. In magnetic fields, the resistivity rho of CdCr2S4 responds similarly to that of CMR manganites. Combing previous reports, these findings make CdCr2S4 the unique compound to possess all four properties of the colossal magnetocapacitive, colossal electrocapacitive, CER, and CMR. The present results open a new venue for searching new materials to show CMR by tuning electric and magnetic fields.
Performance assessment of a BIPV integrated with a layer of water-saturated MEPCM
(2013-12-01)
Ho, C. J.
;
Jou, Bor-Tyng
;
Lai, Chi-Ming
;
Huang, Chao-Yang
;
機械工程學系
The use of a water-saturated microencapsulated phase change material (MEPCM) layer as a passive thermal management medium for a building-integrated photovoltaic (BIPV) was modeled by CFD numerical simulation to explore the effects of different MEPCM melting points and MEPCM layer thicknesses on the thermal and electrical performance. The well-designed BIPV can hopefully remain at a relatively low temperature during peak sunshine hours due to the absorption of latent heat during the phase change of the MEPCM layer, which reduces the decrease in electric generation efficiency caused by the increase in temperature due to solar radiation, thereby enhancing the electric generation efficiency. The results showed that a BIPV integrated with a MEPCM layer produced a significant improvement in the thermal and electrical performance compared to an untreated PV module. Under local summer climatic conditions, a melting point of 30 C and a 3-cm-thick MEPCM (using paraffin as the core material) layer are recommended for the thermal management medium. (C) 2013 Elsevier B.V. All rights reserved.