Design and optimization of temperature control system for special environment in site museums

To protect the unearthed relics and investigate the temperature related parameters for appropriate preservation environments, a multi-field-coupled test chamber and a temperature control system were developed according to the complex environment in actual site museums in terms of the parameters of air, unearthed relics and soil. The multi-field-coupled system reproduced both the upper air condition and the lower soil environment within the designed chamber. It uses the upper air supply and exhaust flow configuration with minimum impact on the unearthed relics to realize a gallery display layout for the unearthed relics. When the air change number is a given constant in this chamber, the temperature field and flow field distributions can be optimized by changing the angle of air flow supplied to the test chamber via an articulated mechanism. The influences of air feeding angle on the internal temperature and flow fields were investigated by experiment using CFD software FLUENT, and the optimized protection scheme was achieved correspondingly. The experimental and numerical results show that for the multi-field-coupled test chamber developed in this research, uniform internal temperature and flow fields can be obtained under relatively small air feeding angle, while the energy loss can be reduced simultaneously. The designed multi-field-coupled control system may provide a reference to the investigation of air supplied temperature field in similar relics protection sites for such as Han Yang Ling Mausoleum and Terra-Cotta Warriors.