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Solar energy utilizing technology for future cities

Journal Article:

Abstract

This report proposes solar energy utilizing technologies for future cities, centering on a system that uses Fresnel lenses and optical fiber cables. This system selects out beams in the visible range and the energy can be sent to end terminals constantly as long as sunlight is available. Optical energy is concentrated 4,000-fold. The system can provide long-distance projection of parallel rays. It will be helpful for efficient utilization of light in cities and can increase the degree of freedom in carrying out urban development. The total efficiency for the introduction into optical fiber can be up to 40 percent. With no heating coil incorporated, there is no danger of fire. The standard size of a light condenser is 2 m in dome diameter and 2.5 m in height. Auxiliary artificial light is used for backup purposes when it is cloudy. Heat pumps operating on solar thermal energy are employed to maintain air conditioning for 24 hours a day in order to ensure the establishment of an environment where residential areas exist in the neighborhood of office areas. Seven automatic solar light collection and transfer systems are currently in practical use at the Arc Hills building. The combination of Fresnel lens  More>>
Authors:
Publication Date:
Nov 20, 1987
Product Type:
Journal Article
Reference Number:
NEDO-87-910924; EDB-88-100328
Resource Relation:
Journal Name: Nenryo Kyokai-shi; (Japan); Journal Volume: 66:11
Subject:
14 SOLAR ENERGY; 29 ENERGY PLANNING, POLICY AND ECONOMY; SOLAR ENERGY; URBAN AREAS; PLANNED COMMUNITIES; AIR CONDITIONING; CONCENTRATION RATIO; FRESNEL LENS; HEAT PUMPS; OPTICAL FIBERS; SOLAR REFLECTORS; THERMAL RADIATION; VISIBLE RADIATION; COMMUNITIES; ELECTROMAGNETIC RADIATION; ENERGY; ENERGY SOURCES; EQUIPMENT; FIBERS; LENSES; RADIATIONS; RENEWABLE ENERGY SOURCES; SOLAR CONCENTRATORS; SOLAR EQUIPMENT; 141000* - Solar Collectors & Concentrators; 299000 - Energy Planning & Policy- Unconventional Sources & Power Generation
OSTI ID:
5160458
Research Organizations:
Keio Univ., Faculty of Science and Technology, Tokyo, Japan
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: NENKA
Submitting Site:
NEDO
Size:
Pages: 948-959
Announcement Date:

Journal Article:

Citation Formats

Mori, Kei. Solar energy utilizing technology for future cities. Japan: N. p., 1987. Web.
Mori, Kei. Solar energy utilizing technology for future cities. Japan.
Mori, Kei. 1987. "Solar energy utilizing technology for future cities." Japan.
@misc{etde_5160458,
title = {Solar energy utilizing technology for future cities}
author = {Mori, Kei}
abstractNote = {This report proposes solar energy utilizing technologies for future cities, centering on a system that uses Fresnel lenses and optical fiber cables. This system selects out beams in the visible range and the energy can be sent to end terminals constantly as long as sunlight is available. Optical energy is concentrated 4,000-fold. The system can provide long-distance projection of parallel rays. It will be helpful for efficient utilization of light in cities and can increase the degree of freedom in carrying out urban development. The total efficiency for the introduction into optical fiber can be up to 40 percent. With no heating coil incorporated, there is no danger of fire. The standard size of a light condenser is 2 m in dome diameter and 2.5 m in height. Auxiliary artificial light is used for backup purposes when it is cloudy. Heat pumps operating on solar thermal energy are employed to maintain air conditioning for 24 hours a day in order to ensure the establishment of an environment where residential areas exist in the neighborhood of office areas. Seven automatic solar light collection and transfer systems are currently in practical use at the Arc Hills building. The combination of Fresnel lens and optical fiber is more than six times as high in efficiency as a reflecting mirror. (5 figs, 3 tabs, 8 photos, 6 refs)}
journal = {Nenryo Kyokai-shi; (Japan)}
volume = {66:11}
journal type = {AC}
place = {Japan}
year = {1987}
month = {Nov}
}