Early solar irradiation as a source of the inner solar system chromium isotopic heterogeneity

The Sun is 16O-enriched (Δ17O = −28.4 ± 3.6‰) relative to the terrestrial planets, asteroids, and chondrules (−7‰ < Δ17O < 3‰). Ca,Al-rich inclusions (CAIs), the oldest Solar System solids, approach the Sun’s Δ17O. Ultraviolet CO self-shielding resulting in formation of 16O-rich CO and 17,18O-enriched water is the currently favored mechanism invoked to explain the observed range of Δ17O. However, the location of CO self-shielding (molecular cloud or protoplanetary disk) remains unknown. Here we show that CAIs with predominantly low (26Al/27Al)0, <5 × 10−6, exhibit a large inter-CAI range of Δ17O, from −40‰ to −5‰. In contrast, CAIs with the canonical (26Al/27Al)0 of ~5 × 10−5 from unmetamorphosed carbonaceous chondrites have a limited range of Δ17O, −24 ± 2‰. Because CAIs with low (26Al/27Al)0 are thought to have predated the canonical CAIs and formed within first 10,000–20,000 years of the Solar System evolution, these observations suggest oxygen isotopic heterogeneity in the early solar system was inherited from the protosolar molecular cloud.

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Mixing and Transport of Isotopic Heterogeneity in the Early Solar System

Annual Review of Earth and Planetary Sciences ◽

10.1146/annurev-earth-042711-105552 ◽

2012 ◽

Vol 40 (1) ◽

pp. 23-43 ◽

Cited By ~ 16

Author(s):

Alan P. Boss

Keyword(s):

Solar System ◽

Early Solar System ◽

Isotopic Heterogeneity ◽

Mixing And Transport

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Oxygen Isotopic Heterogeneity in the Solar System Inherited from the Protosolar Molecular Cloud

10.46427/gold2020.1371 ◽

2020 ◽

Author(s):

Alexander N. Krot ◽

Kazuhide Nagashima ◽

James Lyons ◽

Jeong-Eun Lee ◽

Martin Bizzarro

Keyword(s):

Solar System ◽

Molecular Cloud ◽

Isotopic Heterogeneity ◽

Oxygen Isotopic

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Performance Analyses of 15 kW Grid-Tied Photo Voltaic Solar System Type under Baghdad city climate

Journal of Engineering ◽

10.31026/j.eng.2020.04.02 ◽

2020 ◽

Vol 26 (4) ◽

pp. 21-32

Author(s):

Nibras Mahmood Obaid ◽

Emad T. Hashim ◽

Naseer K. Kasim

Keyword(s):

Solar System ◽

Average Power ◽

Performance Ratio ◽

Solar Irradiation ◽

Solar Array ◽

Energy Yield ◽

Solar Pv ◽

Pv System ◽

Current Output ◽

Performance Analyses

The performance analyses of 15 kWp (kW peak) Grid -Tied solar PV system (that considered first of its type) implemented at the Training and Energy Research Center Subsidiary of Iraqi Ministry of Electricity in Baghdad city has been achieved. The system consists of 72 modules arranged in 6 strings were each string contains 12 modules connected in series to increase the voltage output while these strings connected in parallel to increase the current output. According to the observed duration, the reference daily yields, array daily yields and final daily yields of this system were (5.9, 4.56, 4.4) kWh/kWp/day respectively. The energy yield was 1585 kWh/kWp/year while the annual total solar irradiation received by solar array system was 1986.4kWh/m2. The average power losses per day of array, system losses and overall losses were (1.38, 0.15, 1.53) kWh/kWp/day respectively. The average capacity factor and performance ratio per year were 18.4% and 75.5% respectively. These results highlighted the performance analyses of this PV solar system located in Baghdad city. The performance can be considered as good and significant comparing with other world PV solar stations.

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Stable strontium isotopic heterogeneity in the solar system from double-spike data

Geochemical Perspectives Letters ◽

10.7185/geochemlet.1733 ◽

2017 ◽

pp. 35-40 ◽

Cited By ~ 7

Author(s):

B.L.A. Charlier ◽

I.J. Parkinson ◽

K.W. Burton ◽

M.M. Grady ◽

C.J.N. Wilson ◽

...

Keyword(s):

Solar System ◽

Isotopic Heterogeneity ◽

Stable Strontium

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Mg isotopic heterogeneity, Al-Mg isochrons, and canonical26Al/27Al in the early solar system

Meteoritics and Planetary Science ◽

10.1111/maps.12014 ◽

2012 ◽

Vol 47 (12) ◽

pp. 1980-1997 ◽

Cited By ~ 42

Author(s):

G. J. WASSERBURG ◽

Josh WIMPENNY ◽

Qing-Zhu YIN

Keyword(s):

Solar System ◽

Early Solar System ◽

Isotopic Heterogeneity

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PLANETARY-SCALE STRONTIUM ISOTOPIC HETEROGENEITY AND THE AGE OF VOLATILE DEPLETION OF EARLY SOLAR SYSTEM MATERIALS

The Astrophysical Journal ◽

10.1088/0004-637x/758/1/45 ◽

2012 ◽

Vol 758 (1) ◽

pp. 45 ◽

Cited By ~ 64

Author(s):

Frédéric Moynier ◽

James M. D. Day ◽

Wataru Okui ◽

Tetsuya Yokoyama ◽

Audrey Bouvier ◽

...

Keyword(s):

Solar System ◽

Early Solar System ◽

Planetary Scale ◽

Isotopic Heterogeneity

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Noble Gas Thermochronology of Extraterrestrial Materials

Elements ◽

10.2138/gselements.16.5.331 ◽

2020 ◽

Vol 16 (5) ◽

pp. 331-336

Author(s):

Marissa M. Tremblay ◽

William S. Cassata

Keyword(s):

Solar System ◽

Noble Gas ◽

Space Missions ◽

Solar Irradiation ◽

Thermal Processes ◽

The Moon ◽

Planetary Interiors ◽

Extraterrestrial Materials ◽

Terrestrial Planetary Bodies ◽

Impact Events

Rocks from extraterrestrial bodies in the Solar System are influenced by thermal processes occurring within planetary interiors and on their surfaces. These range from the extremely hot and brief, in the case of impact events, to the comparatively cool and protracted, in the case of solar irradiation of rocks residing in regoliths for millions to billions of years. Noble gas thermochronology applied to meteorites and extraterrestrial materials returned by space missions enables us to decipher the histories of these materials and thereby understand fundamental aspects of the evolution of terrestrial planetary bodies, including the Moon, Mars, and asteroids.

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Methods for the Sustainable Design of Solar Energy Systems for Industrial Process Heat

Sustainability ◽

10.3390/su12125127 ◽

2020 ◽

Vol 12 (12) ◽

pp. 5127

Author(s):

Alessandro Franco

Keyword(s):

Solar System ◽

Solar Energy ◽

Optimum Design ◽

Energy Demand ◽

Fossil Fuel ◽

Industrial Process ◽

Solar Irradiation ◽

Medium Temperature ◽

Solar Fraction ◽

Process Heat

In this paper, the production of low to medium temperature water for industrial process heat using solar energy is considered. In particular, the paper outlines the perspective of an optimum design method that takes into account all of the typical variables of the problem (solar irradiation, system architecture, design constraints, load type and distribution, and design and optimization criteria) and also considers the use of the fossil fuel backup system. The key element of the methodology is the definition of a synthetic combined energetic and economic utility function. This considers the attribution of an economic penalty to irreversibility in connection with the use of a fossil fuel backup. This function incorporates the share of the solar system production (solar fraction) as an optimum design variable. This paper shows how, using the proposed criteria, the optimal value of the solar fraction, defined as the share of operation of the solar system with respect to the whole energy demand, can be increased. Current practice considers values in the range between 40 and 60%. However, levels up to 80% can also be obtained with the proposed methodology. Thus, penalizing the use of fossil fuels does not exclude a priori their contribution.

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