Permanently dispelling a myth of photovoltaics via the adoption of a new net energy indicator

Richards, Bryce S.; Watt, Muriel

doi:10.1016/j.rser.2004.09.015

Cited by 41 publications

(24 citation statements)

References 13 publications

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“…For this purpose one may Table 2 Energy content coefficients and service period considered for the BOS components, the system installation and M&O stages, and the diesel-electric generator [13,14,[42][43][44][45]50]. use the above-described method in three selected islands, i.e.…”

Section: Application Of the Developed Methodologymentioning

confidence: 99%

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Optimum autonomous photovoltaic solution for the Greek islands on the basisof energy pay-back analysis

Kaldellis

Σιμωτάς

Zafirakis

et al. 2009

Journal of Cleaner Production

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Section: Application Of the Developed Methodologymentioning

confidence: 99%

“…Using the data available in the international literature (e.g. [13,14,[42][43][44][45]) one may find in Table 1 typical values concerning the energy content coefficient ''3 PV '' for the manufacturing of mc-Si PV modules.…”

Section: Appendixmentioning

confidence: 99%

Optimum autonomous photovoltaic solution for the Greek islands on the basisof energy pay-back analysis

Kaldellis

Σιμωτάς

Zafirakis

et al. 2009

Journal of Cleaner Production

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“…For a typical on-site PV installation the EE can be estimated as 6120 MJ per square meter [38][39][40][41]. Its yearly energy savings in primary energy terms, calculated for Ireland and with typical efficiency factors from EN 15316 [42] would be 1094 MJ (112 kWh yearly electricity output per square meter, with a primary energy conversion factor of 2.7).…”

Section: Ner =mentioning

confidence: 99%

Net energy analysis of domestic solar water heating installations in operation

Hernández

Kenny

2012

Renewable and Sustainable Energy Reviews

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The potential of solar water heating systems to reduce domestic energy use is frequently acknowledged. However there are two factors that are rarely discussed when studying this technology. Firstly the real performance of the installed systems in operation, and secondly a life cycle perspective of its energy use. These two issues are reviewed in this paper, and a field study in Ireland is also presented. In the review, some studies show that measured real performance of domestic solar water heating systems can be lower than expectations. Concerning their life cycle energy performance, existing studies show that the initial energy investment for the systems (their embodied energy) is a small portion of the energy savings over their lifetime with calculation paybacks generally lower than 2 years. On the field study carried in Ireland, representative of a maritime north European climate, the 'energy payback' based on the expected energy savings is between 1.2 and 3.5 years, values comparable to previous studies considering the less favourable climate and installation characteristics. However the measured energy savings generally worsened the life cycle energy performance of this technology and thus increased the energy payback period. The study concludes that while there is a real potential for life cycle energy savings through domestic solar water heating installations, devising mechanisms to ensure proper design, installation and operation of systems is essential for this technology. Introduction: the potential of domestic solar water heatingEnergy consumption in residential buildings represents a large portion of global energy use, approximately 25% of total primary energy use in the European Union [1]. Water heating was responsible for around a quarter of that energy use [2]. Domestic Solar Water Heating (DSWH) is a well-proven technology used to reduce the energy demand for providing domestic hot water, and its potential to largely reduce domestic energy use is frequently acknowledged [3][4][5][6].

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“…The energy payback time (EPT) was defined as the time (in years) in which the primary energy used to manufacture the solar combisystem was compensated by the reduction of annual electricity use [19]. With the energy payback time value of 4.9 years for design alternative No.1 and 6.0 years for design alternative No.2, the results are higher than the typical energy payback times of solar combisystems (without long-term storage capacity) ranging from 2.0 to 4.3 years [20].…”

Section: Life Cycle Energy Usementioning

confidence: 99%

Residential Solar-Based Seasonal Thermal Storage Systems in Cold Climates: Building Envelope and Thermal Storage

Hugo

Zmeureanu

2012

Energies

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Abstract:The reduction of electricity use for heating and domestic hot water in cold climates can be achieved by: (1) reducing the heating loads through the improvement of the thermal performance of house envelopes, and (2) using solar energy through a residential solar-based thermal storage system. First, this paper presents the life cycle energy and cost analysis of a typical one-storey detached house, located in Montreal, Canada. Simulation of annual energy use is performed using the TRNSYS software. Second, several design alternatives with improved thermal resistance for walls, ceiling and windows, increased overall air tightness, and increased window-to-wall ratio of South facing windows are evaluated with respect to the life cycle energy use, life cycle emissions and life cycle cost. The solution that minimizes the energy demand is chosen as a reference house for the study of long-term thermal storage. Third, the computer simulation of a solar heating system with solar thermal collectors and long-term thermal storage capacity is presented. Finally, the life cycle cost and life cycle energy use of the solar combisystem are estimated for flat-plate solar collectors and evacuated tube solar collectors, respectively, for the economic and climatic conditions of this study.

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Permanently dispelling a myth of photovoltaics via the adoption of a new net energy indicator

Cited by 41 publications

References 13 publications

Optimum autonomous photovoltaic solution for the Greek islands on the basisof energy pay-back analysis

Optimum autonomous photovoltaic solution for the Greek islands on the basisof energy pay-back analysis

Net energy analysis of domestic solar water heating installations in operation

Residential Solar-Based Seasonal Thermal Storage Systems in Cold Climates: Building Envelope and Thermal Storage

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