10,960 research outputs found

    Development of High Efficiency (14%) Solar Cell Array Module

    Get PDF
    High efficiency solar cells required for the low cost modules was developed. The production tooling for the manufacture of the cells and modules was designed. The tooling consisted of: (1) back contact soldering machine; (2) vacuum pickup; (3) antireflective coating tooling; and (4) test fixture

    Development of high efficiency (14 percent) solar cell array module

    Get PDF
    Most effort was concentrated on development of procedures to provide large area (3 in. diameter) high efficiency (16.5 percent AM1, 28 C) P+NN+ solar cells. Intensive tests with 3 in. slices gave consistently lower efficiency (13.5 percent). The problems were identified as incomplete formation of and optimum back surface field (BSF), and interaction of the BSF process and the shallow P+ junction. The problem was shown not to be caused by reduced quality of silicon near the edges of the larger slices

    Three computer codes to read, plot and tabulate operational test-site recorded solar data

    Get PDF
    Computer programs used to process data that will be used in the evaluation of collector efficiency and solar system performance are described. The program, TAPFIL, reads data from an IBM 360 tape containing information (insolation, flowrates, temperatures, etc.) from 48 operational solar heating and cooling test sites. Two other programs, CHPLOT and WRTCNL, plot and tabulate the data from the direct access, unformatted TAPFIL file. The methodology of the programs, their inputs, and their outputs are described

    S.J. Sampson - Holmes Funeral Directors, December 20, 1925

    Get PDF
    Correspondence: Handwritten note from S.J. Sampson, St. Petersburg, Florida, requesting payment from Holmes Funeral Directors, Jacksonville, Florida, on balance due of $17.68

    Private Sector Involvement in Urban Solid Waste Collection. Performance, capacity and regulations in five cities in Ghana

    Get PDF
    This thesis focuses on the private sector involvement in solid waste collection, and the influence of private sector capacity and local governments‘ regulations on private sector performance. Private sector involvement in public service pro-vision evolved to deal with market and government failures (van Dijk, 2008b). The public sector is playing a leading role of purchaser (buyer) on behalf of citi-zens through subsidies and/or user charges, whiles the private sector is taking on an increasing role as provider (seller) of public services, and being regulated by the public sector to correct market failures associated with ‗public good‘ nature of solid waste service. It is believed that private sector involvement is a way to maintain market discipline and to bring private sector management and technical expertise and private finance into public service to achieve cost efficiency and better service provision (improve service quality) (Cointreau, 1994; Bartone, 2001; van Dijk, 2008b). Even though private sector involvement (PSI) provides opportunities for improved efficiency and service quality, the few s
    • 

    corecore