NDLI: Adaptive defrost

Content Provider	IEEE Xplore Digital Library
Author	Allard, J. Heinzen, R.
Copyright Year	1972
Abstract	The adaptive defrost concept operates on demand, initiating a defrost cycle only when needed, thereby saving energy and yet maintaining refrigeration system efficiency. This is accomplished by automatically adjusting the frost accumulation period to achieve an optimal predetermined defrost time. The optimal defrost time is previously determined for the particular refrigeration system and programmed into the control. The next frost accumulation time period is made a function of the optimal defrost time, the previous frost accumulation time, and the previous actual defrost time. The system thus operates according to the following relationships: Ta=(a-1)+K(Do-Da), where Ta=length of the next frost accumulation period; T(a-1)=length of the last frost accumulation period; Do=optimal defrost time; Da=length of the actual defrost time; and K=system constant that determines the multiple by which the frost accumulation period will change for each increment of error in the defrost time.<>
Sponsorship	IEEE Industry Applications Society
Starting Page	39
Ending Page	42
Page Count	4
File Size	380882
File Format	PDF
ISSN	00939994
Volume Number	24
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Refrigeration Automatic control Control systems Home appliances Temperature control Heat transfer Electrical equipment industry Monitoring Optimal control
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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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

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