Development and recent trends in greenhouse dryer: A review

摘要: Abstract Food is necessity for human being. As the world population increasing, it very difficult to fulfil everyone's need of food. One alternatives this problem preservation crops, vegetable and fruits when available in abundant amount. Drying one best methods preserve agricultural products long time but requires lot energy. availability electricity per capita developing under developed countries less, thus uses heating purpose cannot be economically environmentally justified option. So entrapment thermal energy from solar radiation may option drying. Solar can utilized drying different ways namely open sun closed (direct indirect). Open have various disadvantages like contamination dust particles, bacteria crop, decolouration product after etc. To overcome these problems greenhouse or has been developed. This review an attempt explore types systems was across world. Further modelling, mathematical modelling performance evaluation on basis characteristic curve discussed. discussed detail evaluate heat transfer coefficient, absorbed moisture evaporate with experimental validation give practical exposure researchers.