NDLI: A Microboiler: Waste Heat to Power Scavenging System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Thapa, S. Borquist, E. Baniya, A. Fang, J. Wood, D. Weiss, L.
Copyright Year	2014
Abstract	This paper presents the detailed fabrication and baseline operational characterization of a miniature device capable of recovering waste heat for power. Waste heat to power is the process of scavenging heat from a large process as a result of mechanical inefficiencies and using that heat to generate useful power. To address this waste heat to power recovery approach, a MEMS based microboiler has been investigated in this work which is capable of capturing waste heat. The microboiler consists of a micro fabricated boilerplate and a steamdome. The boilerplate has been designed with capillary channels capable of driving fluid flow from the surrounding reservoirs to the heated surface, thus eliminating the need of an electrically powered flow pump. The working fluid undergoes phase change inside the enclosed central steamdome attached atop the boilerplate. This pressurized vapor can be made available to another MEMS device such as PZT membrane capable of generating mechanical or electrical power. In this way, the discarded heat from the larger process can be utilized to generate power output. In contrast to the previous work, a thick acrylic steamdome has been replaced with a thin glass steamdome to minimize premature condensation of vapor due to heat loss via large mass. The tests were performed on the microboiler with the input powers of 1.8 W and 2.7 W and the comparisons of the results were carried out using a simulation model. The average temperatures at the top of the boilerplate were 106° C and 144° C for the power inputs of 1.8 W and 2.7 W, respectively. The available powers at the top of the boilerplate via heat conduction were 1.14 W and 1.72 W for the power inputs of 1.8 W and 2.7 W for the supplied powers of 1.8 W and 2.7 W, respectively. With these known available power throughputs and the heat of vaporization of the future working fluid, the calculated maximum mass flow rates were 13.6 mg/s and 9.12 mg/s, respectively.
File Format	PDF
ISBN	9780791849590
DOI	10.1115/IMECE2014-38478
Volume Number	Volume 10: Micro- and Nano-Systems Engineering and Packaging
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Microelectromechanical systems Membranes Temperature Fluid dynamics Simulation models Heat losses Vapors Glass Energy harvesting Flow (dynamics) Condensation Electricity (physics) Heat conduction Heat Fluids Pumps Heat of vaporization Reservoirs Manufacturing Waste heat
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in