NDLI: Sun Tracking Photo-Sensor for Solar Thermal Concentrating System

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Aiuchi, Kosuke Yoshida, Kazuo Katayama, Yukuo Nakamura, Minoru Nakamura, Katsushige
Copyright Year	2004
Abstract	This paper presents the structure and application of a sun tracking photo-sensor, which controls the direction of a reflected solar radiation to be constant. The sensor has a very simple structure, in which two photo-cells are placed side by side in the bottom of a box with an aperture. When the reflected solar radiation passes through the aperture, the photo-cells are fractionally illuminated, and a electric current, which is proportional to the illuminated area, is generated on each photo-cell. The direction of the reflected solar radiation is kept to be constant by controlling the angle of the reflection mirror to make the two currents equal. The performance of the photo-sensor was tested with a mirror-telescope system and the sun tracking error was estimated to be less than 0.6 mrad on sunny day. To ascertain the applicability of the photo-sensor, a sensor-controlled heliostat, in which no computer-control system and rotary encoders were installed, was manufactured. The performance of the heliostat was evaluated by observing the radiation on the target screen which was placed 70 m south side of the heliostat, and the angular error within 2 mrad was achieved on sunny days, while the tracking error increased in various ways in cloudy weather. This photo-sensor is applicable for small solar furnace, sun lighting system, and sun tracking photovoltaic system.
Sponsorship	Solar Energy Division
Starting Page	625
Ending Page	631
Page Count	7
File Format	PDF
ISBN	0791837475
DOI	10.1115/ISEC2004-65025
Volume Number	Solar Energy
Conference Proceedings	ASME 2004 International Solar Energy Conference
Language	English
Publisher Date	2004-07-11
Publisher Place	Portland, Oregon, USA
Access Restriction	Subscribed
Subject Keyword	Reflection Computer control Errors Furnaces Radiation (physics) Shaft angle encoders Solar energy Telescopes Photovoltaic power systems Sensors Solar radiation Mirrors Currents Electric current
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

Photovoltaic systems with solar tracking mirrors

Research and design on a robust sun-tracker

Analysis on Concentrating Radiation Transfer to Solar Array with Concentrator

A novel tracking system development of photovoltaic for low radiation

Multi-directional solar tracker using low cost photo sensor matrix

A Control Process for Active Solar-Tracking Systems for Photovoltaic Technology and the Circuit Layout Necessary for the Implementation of the Method

Concentrating Photovoltaic Module Testing at NREL's Concentrating Solar Radiation Users Facility

Microprocessor-controlled autonomous sun-following mount for solar photovoltaic energy planning

Comparative Economic Analysis of Concentrating Solar Technologies

Sun Tracking Photo-Sensor for Solar Thermal Concentrating System

Similar Documents

Photovoltaic systems with solar tracking mirrors

Research and design on a robust sun-tracker

Analysis on Concentrating Radiation Transfer to Solar Array with Concentrator

A novel tracking system development of photovoltaic for low radiation

Multi-directional solar tracker using low cost photo sensor matrix

A Control Process for Active Solar-Tracking Systems for Photovoltaic Technology and the Circuit Layout Necessary for the Implementation of the Method

Concentrating Photovoltaic Module Testing at NREL's Concentrating Solar Radiation Users Facility

Microprocessor-controlled autonomous sun-following mount for solar photovoltaic energy planning

Comparative Economic Analysis of Concentrating Solar Technologies

Sun Tracking Photo-Sensor for Solar Thermal Concentrating System