Research on a compact adsorption room air conditioner
摘要:
A novel compact adsorption room air conditioner with a cooling capacity of 1 kW has been designed, and two prototypes have been built. A two bed, continuous adsorption refrigeration cycle with heat recovery and mass recovery is adopted. Micropore spherical silica gel and water are selected as the working pair. A gravity heat pipe with methanol as working medium is designed to output the cooling. Experimental investigations have indicated that under typical air conditioning conditions, for the first prototype, a cooling capacity of 687 W and a COP (coefficient of performance) of 0.307 can be obtained. However, for the improved one, a cooling capacity of 790 W and a COP of 0.446 can be reached. It is also proved that the operating temperatures have strong influences on the performance. The designed room air conditioner can be driven by a low grade heat source (< 90 degrees C) and has small dimensions of 300 mm (depth), 500 mm (width) and 950 mm (height). (c) 2006 Elsevier Ltd. All rights reserved.
The reaction of alkyl 4-hydroxy-2-alkynoates and 4-hydroxy-2-alkyn-1-ones with palladium tributylammonium formate and with tributylamine: Preparation of 1,4-dicarbonyl compounds
作者:A. Arcadi、S. Cacchi、F. Marinelli、D. Misiti
DOI:10.1016/s0040-4039(00)80324-x
日期:1988.1
Ethyl 4-oxo-2-alkenoates and 1,4-dioxo-2-alkenes are easily prepared by treating ethyl 4-hydroxy-2-alkynoates and 4-hydroxy-2-alkyn-1-ones with n-tributylamine. Treatment of ethyl 4-hydroxy-2-alkynoates and 4-hydroxy-2-alkyn-1-ones with palladium-tributylammonium formate produces ethyl 4-oxo-alkanoates and 1,4-alkandiones in good to high yield through a novel one-pot isomerization/hydrogenation reaction
The in situ oxidation–Wittig reaction of α-hydroxyketones
作者:Karen A. Runcie、Richard J. K. Taylor
DOI:10.1039/b201513g
日期:2002.4.19
In situ oxidationâWittig methodology has been applied to α-hydroxyketones avoiding the problems normally associated with α-ketoaldehydes; the procedure is practically simple, and in many cases gives high yields of the product γ-ketocrotonates; the procedure has also been successfully utilised with ethyl glycolate and glycolaldehyde dimer.
ARCADI, A.;CACCHI, S.;MARINELLI, F.;MISITI, D., TETRAHEDRON LETT., 29,(1988) N 12, 1457-1460
作者:ARCADI, A.、CACCHI, S.、MARINELLI, F.、MISITI, D.
DOI:——
日期:——
Research on a compact adsorption room air conditioner
作者:G.Z. Yang、Z.Z. Xia、R.Z. Wang、Daou Keletigui、D.C. Wang、Z.H. Dong、X. Yang
DOI:10.1016/j.enconman.2005.12.005
日期:2006.9
A novel compact adsorption room air conditioner with a cooling capacity of 1 kW has been designed, and two prototypes have been built. A two bed, continuous adsorption refrigeration cycle with heat recovery and mass recovery is adopted. Micropore spherical silica gel and water are selected as the working pair. A gravity heat pipe with methanol as working medium is designed to output the cooling. Experimental investigations have indicated that under typical air conditioning conditions, for the first prototype, a cooling capacity of 687 W and a COP (coefficient of performance) of 0.307 can be obtained. However, for the improved one, a cooling capacity of 790 W and a COP of 0.446 can be reached. It is also proved that the operating temperatures have strong influences on the performance. The designed room air conditioner can be driven by a low grade heat source (< 90 degrees C) and has small dimensions of 300 mm (depth), 500 mm (width) and 950 mm (height). (c) 2006 Elsevier Ltd. All rights reserved.