基于ANSYS的日光温室复合相变保温墙体的模拟研究

SIMULATION STUDY ON COMPOSITE PHASE CHANGE THERMAL INSULATIONWALLS IN SOLAR GREENHOUSE BASED ON ANSYS

复合相变保温砂浆可作为内保温砂浆与日光温室墙体组成复合相变保温墙体,为温室生产提供热能。通过对日光温室相变墙体相变传热过程的数值模拟研究,可较好地掌握其蓄放热特性,为日光温室应用复合相变材料提供理论支持。该文利用ANSYS有限元分析软件模拟研究日光温室复合相变保温墙体的传热过程,数值模拟结果表明:50 mm复合相变保温砂浆与490 mm砖墙组成的复合相变保温墙体和30 mm复合相变保温砂浆与240 mm加气混凝土砌块墙组成的复合相变保温墙体都具有较强的蓄放热能力,两者的持续蓄热时间均为8 h,持续放热时间分别为16和13 h,这2种复合相变保温墙体均适合于冬季温室生产。

Composite phase change insulation mortar can be used as internal insulation and energy storage layer,together with the walls of solar greenhouse,to constitute the composite phase-change thermal insulation wall,which can provides heat energy but also insulation for greenhouse production.The heat charge and discharge characteristics of solar greenhouse phase change wall are numerically simulated based on finite element analysis software ANSYS in this paper,which providing theoretical support for the application of composite phase-change materials in solar greenhouse.This study numerically examines the heat transfer process of composite phase change thermal insulation wall.The results show that this walls,which consists of composite phase change insulation mortar with 50 mm and 30 mm thick,respectively,and brick wall with 490 mm thick and aerated concrete block wall with 240 mm thick,respectively,has a strong ability of heat store and release.Both of them have 8 hours heat storage duration of time,while the duration time of heat release is 16 and 13 hours,respectively.Overall,two kinds of the walls are suitable for greenhouse production in winter.