SLUDGE DRYING IN A GREENHOUSE ASSISTED BY A HEAT PUMP
Sludge management is an ever-increasing problem due to environmental pollution and energy consumption. This paper presents the study of the wastewater-sludge drying using heat provided by solar energy and complemented by a heat pump. Several heat pump designs have been tested in order to analyze advantages and drawbacks of heating by the floor (heat conduction), or by the above (convection by air) or by both. Moreover, energy can be recovered from hot and humid air sweeping the greenhouse and/or from water coming out of the wastewater treatment plant. The annual drying rate scheme is highly increased by the use of a heat pump when compared to the solar drying rate. The annual quantity of sludge that can be dried is largely enhanced while energy consumption is maintained lower than conventional drying systems, by a factor of 4.
Rayan SLIM Assaad ZOUGHAIB Denis CLODIC
Ecole des Mines de Paris, Center for Energy and Process Studies 60, boulevard Saint-Michel – F – 75272 Paris Cedex 06
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）