An Energy-Efficient, Ventless Tumbler-Dryer

Navy ships need improved laundry dryers that use less energy and operate without air vents. Ventless dryers eliminate the need for very long exhaust ductwork and reduce fire hazards. We propose to develop a reliable, compact, tumbler-dryer that employs an innovative water separation process that is energy efficient and does not require an exhaust vent. The water removed in this process is in the liquid phase and thus can be easily drained away, eliminating the need for an air vent. The proposed dryer will use less than half the energy consumed by a conventional dryer. In Phase I, we proved the feasibility of our approach through laboratory demonstrations, system analysis, and conceptual design. We demonstrated the performance of key components. Our validated analysis model predicts that the ventless shipboard dryer will be compact and energy efficient. Our mechanical layout design shows that the dryer will be suitable for Navy shipboard applications. In Phase II, we will develop fabrication methods for key components, build and demonstrate a complete prototype ventless shipboard dryer, and deliver the dryer to the Navy for further performance evaluation.