| Título: | Cropping in Semi-arid North-west India in Greenhouse with Ground Coupling Shading and Natural Ventilation for Environmental Control |
| Autores: |
Sharan, Girja; DA Institue of Information and Communication Technology Madhavan, T.; Indian Institute of Management |
| Fecha: | 2010-05-12 |
| Publicador: | International Journal for Service Learning in Engineering, Humanitarian Engineering and Social Entrepreneurship |
| Fuente: |
 |
| Tipo: |
service design projects |
| Tema: | Earth-tube-heat- exchanger, greenhouse, semi- arid areas |
| Descripción: | Research is ongoing to develop greenhouse technology with controls economical on water and energy, to improve farming in water-scarce, hot, semi-arid region of north-west India. A greenhouse under investigation, is coupled to earth-tube–heat– exchanger (ETHE) and has provisions for shading, natural ventilation and mist nozzles. In a recent round tomatoes were grown. A regime of natural ventilation and top shading kept the greenhouse temperature close to the ambient in cooler months, although a difference of up to 3 °C was anticipated. Evaporation and later transpiration may have aided cooling. Mist was not used. This became less effective in warmer period as cooling load increased and dense foliage appeared to hinder ventilation. Forced ventilation via ETHE and top shading was then implemented. Inside temperature occasionally rose 2- 3 °C above the ambient. But cropping could be done through spring and early summer. Heating was affectively achieved with ETHE in cold nights of December and January keeping the inside temperatures well above 12°C. Yield was 68 t / ha nearly twice the open fields, water used 266 mm nearly half of the open-fields. This appears to be a promising new way to improve livelihoods from farming. |
| Idioma: | Inglés |
1 Student-led, Community Driven Improvement of the Drinking Supply in a Rural Village in South Africa. por Heil, Ethan; University of Virginia,Nengwenani, Duncan; University of Venda,Raedani, Audrey; University of Venda,Gutierrez, Veronica; University of Virginia,Nthambeleni, Gadisi; University of Venda,Mathoma, Khuthalani; University of Venda,Brown-Glazner, Rachel; University of Virginia,Swap, Robert; University of Virginia | 6 A Portable and Sustainable Computer Education Project for Developing Countries-Phase 1 por Ros, Jordi,Lee, Christine,Bruce, Michael,Fan, Charlie,Quan, Regina,Pai, Henry |
2 Message from the Editor por Colledge, Tom | 7 Learning and Service in Engineering and Global Development por Riley, Donna,Bloomgarden, Alan H. |
3 Service Learning in Engineering and Science for Sustainable Development por Pearce, Joshua M. | 8 Assessment of Wheelchair Technology in Tanzania por Winter, V, Amos G. |
4 Learning Sustainable Design through Service por Al-Khafaji, Karim,Morse, Margaret Catherine | 9 Design of Solar Ovens for Use in the Developing World por Martin, Rachel,Bond, Timothy,Erickson, John,Rog, Morgan,Crowley, Cyprienne,Hutchins, Robert,Fahrner, Grayson,Lai, Kay,Guter, Avi,Steiner, Jack,Wrolstad, Melissa |
5 Redesigning an Appropriate Technology Shredder for Manufacture in a Developing Country por Weiss, Jeffrey,George, Camille,Walker, John | 10 A Portable Sisal Decorticator for Kenyan Farmers por Snyder, Benjamin J.,Bussard, Joe,Dolak, Jim,Weiser, Tim |