摘要：

[Objectives]In order to achieve the annual production of solar greenhouse,a novel solar greenhouse with removable jute fiber back wall( experiment greenhouse) was designed in this study. This paper aims to explore the feasibility of the jute fiber material as the removable back wall. [Methods]The thermal performance,heat transfer characteristics of back walls and indoor thermal environment of greenhouses were studied by using the solar greenhouse with removable jute fiber back wall as the experimental greenhouse and the traditional clay brick back wall greenhouse as control. [Results]In winter,the temperature inside the experimental greenhouse were above 4 ℃,so the thermal insulation performance of jute fiber wall was good. In summer,after the jute fiber wall were removed,the highest indoor temperature was below 40 ℃. The temperatures at different layers and the heat flows of back wall surfaces were significantly affected by indoor,outdoor air temperature and solar radiation,and had the same diurnal variation as indoor and outdoor air temperatures. Temperature of each point inside the wall was affected by inner surface temperature. Overall,the temperature declined from inner surface to outer surface at thickness direction. Compared with the clay brick,jute fiber's thermal storage performance was low,but the insulation effect and the energy utilization was better. [Conclusions]The jute fiber material not only has a good thermal insulation performance,but also has the lower density,so the jute fiber wall is easy to install and disassemble. In addition the jute fiber wall construction and maintenance costs are lower,and overall the jute fiber can be used as a new type material for the novel greenhouse.

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