Evaluation of Thermoacoustic Applications Using Waste Heat to Reduce Carbon Footprint
Prabhudharwadkar, Deoras Mukund
Roberts, William L.
KAUST DepartmentClean Combustion Research Center
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
high-pressure combustion (HPC) Research Group
KAUST Grant NumberURF/1/1975-15
Online Publication Date2021-09-16
Print Publication Date2021-06-07
Permanent link to this recordhttp://hdl.handle.net/10754/671317
MetadataShow full item record
AbstractAbstract Thermoacoustics (TA) engines and refrigerators typically run on the Stirling cycle with acoustic networks and resonators replacing the physical pistons. Without moving parts, these TA machines achieve a reasonable fraction of Carnot’s efficiency. They are also scalable, from fractions of a Watt up to kW of cooling. Despite their apparent promise, TA devices are not in widespread use, because outside of a few niche applications, their advantages are not quite compelling enough to dislodge established technology. In the present study, the authors have evaluated a selected group of applications that appear suitable for utilization of industrial waste heat using TA devices and have arrived at a ranked order. The principal thought is to appraise whether thermoacoustics can be a viable path, from both an economic and energy standpoint, for carbon mitigation in those applications. The applications considered include cryogenic carbon capture for power plant exhaust gases, waste-heat powered air conditioning/water chilling for factories and office buildings, hydrogen liquefaction, and zero-boiloff liquid hydrogen (LH2) storage. Although the criteria used for evaluating the applications are somewhat subjective, the overall approach has been consistent, with the same set of criteria applied to each of them. Thermoeconomic analysis is performed to evaluate the system viability, together with overall consideration of a thermoacoustic device’s general nature, advantages, and limitations. Our study convincingly demonstrates that the most promising application is zero-boiloff liquid hydrogen storage, which is physically well-suited to thermoacoustic refrigeration and requires cooling at a temperature and magnitude not ideal for standard refrigeration methods. Waste-heat powered air conditioning ranks next in its potential to be a viable commercial application. The rest of the applications have been found to have relatively lower potentials to enter the existing commercial space.
CitationSpoor, P., Prabhudharwadkar, D., Somu, S., Saxena, S., Lacoste, D., & Roberts, W. (2021). Evaluation of Thermoacoustic Applications Using Waste Heat to Reduce Carbon Footprint. Volume 4: Controls, Diagnostics, and Instrumentation; Cycle Innovations; Cycle Innovations: Energy Storage; Education; Electric Power. doi:10.1115/gt2021-59688
SponsorsThe research reported in this publication was supported by the Clean Combustion Research Center (CCRC) of the King Abdullah University of Science and Technology (KAUST), under the CCF fund grant (URF/1/1975-15).
PublisherAmerican Society of Mechanical Engineers
Conference/Event nameProceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021