Traditional refrigeration systems based on the compression and expansion of refrigerant gases are complicated and limited to large dimensions. The pumps and compressors required makes it difficult if no impossible to scale down the system to miniature sizes that would be portable. Thermoacoustic based refrigeration systems promises to provide solid state refrigeration with no moving components, and could be scaled down to levels that would make it portable. However poor thermo efficiencies have prevented the concept from being fully developed. A miniature heat pump based on thermoacoustic refrigeration principles is proposed. The proposed concept utilizes a modified fluidic medium using micro/nano caloricparticles based on active materials. This novel improved thermoacoustic refrigeration system promises to provide substantial improvements in thermo efficiency over conventional thermoacoustic designs. The device is scalable to the microlevel, providing cooling for applications of varying dimensional scales. The refrigeration concept provides true refrigeration with much larger cooling temperature ranges compared to thermoelectric devices
