Experiments on solar absorption using a greenhouse-effect gas in a thermal solar collector

2010 ◽  
Vol 2 (5) ◽  
pp. 053102 ◽  
Author(s):  
Abdul Hai M. B. Alami
Keyword(s):  
Greenhouse Effect ◽  
Solar Collector ◽  
Solar Absorption ◽  
Greenhouse Effect Gas

scholarly journals System Design of Solar Absorption Cooling : A Case Study in Building of Engineering Physics Department UGM

KnE Energy ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 22
Author(s):  
Andang Widiharto ◽  
Didit Setyo Pamuji ◽  
Atik Nurul Laila ◽  
Fiki Rahmatika Salis ◽  
Luthfi Zharif ◽  
...  
Keyword(s):  
Global Warming ◽  
Solar Collector ◽  
Air Conditioning ◽  
Cooling System ◽  
Renewable Energy Sources ◽  
Coefficient Of Performance ◽  
Thermal Coefficient ◽  
Solar Absorption ◽  
Absorption Cooling ◽  
Solar Absorption Cooling

<p>Air conditioning (AC) is one of the most building’s energy consumer, included in building of Engineering Physisc’s Departement, Universitas Gadjah Mada (UGM). The declining of fossil fuel reserves and the increasing effects of global warming, forcing the world to switch to renewable energy sources. This paper discusses the design of solar absorption cooling system to replace conventional AC in seven lecture halls of Engineering Physic’s Departement, UGM. There are some steps that have been done to design the solar absorption cooling, i.e. do a study of the potential availability of solar energy, calculate the cooling loads, analyze the thermodynamic process of the system, determine the type of collector to be used and calculate area of solar collector needed. The thermal coefficient of performance (COP) of the system designed was about 0.84 which could use some types of flat plate solar collector with each area corresponding to each efficiency values. </p><p><strong>Keyword</strong> : Air conditioning; global warming; solar absorption cooling; solar collector</p>

scholarly journals Measurement of greenhouse effect gas emissions from drying treatment of poultry manure facility

2014 ◽  
Vol 85 (1) ◽  
pp. 61-69
Author(s):  
Idumi TSUCHIYA ◽  
Hideo ETSUE ◽  
Hiroshi DOUGAN ◽  
Takuma SAKAMOTO ◽  
Mitsuyoshi ISHIDA ◽  
...  
Keyword(s):  
Greenhouse Effect ◽  
Poultry Manure ◽  
Gas Emissions ◽  
Drying Treatment ◽  
Greenhouse Effect Gas

Experimental Investigation on Solar Thermal Properties of Magnetic Nanofluids for Direct Absorption Solar Collector

2016 ◽  
Author(s):  
Qinbo He ◽  
Geni Yan ◽  
Shuangfeng Wang
Keyword(s):  
Magnetic Field ◽  
Thermal Properties ◽  
Field Intensity ◽  
Solar Collector ◽  
Magnetic Field Intensity ◽  
Solar Collectors ◽  
Direct Absorption ◽  
Solar Absorption ◽  
Magnetic Nanofluids ◽  
Direct Absorption Solar Collector

Nanofluids are found to have good optical and thermal properties as direct sunlight absorbers in solar collectors. In this article, Co-H2O nanofluids were prepared through two-step method. The photothermal properties of nanofluids were investigated under different magnetic field intensity. The effect of Co-H2O nanofluids on the efficiency of a direct absorption solar collector was also investigated experimentally. The experimental results show that the applied magnetic field can enhance the solar absorption ability of Co-H2O nanofluids, and has an optimal magnetic field intensity 30Gs. The highest temperature of Co-H2O nanofluid (0.04wt%, 30Gs) is increased up to 39.5% compared with deionized water. The maximum efficiency of direct absorption solar collector with Co-H2O nanofluid under 30Gs magnetic field (0.1wt%, 30nm) is increased up to 51.70% and 13.24% compared with water and Co-H2O nanofluid without magnetic field, respectively. The results indicate that the magnetic field has the potential to effectively improve the solar absorption capabilities of direct absorption solar collectors with magnetic nanofluids.

Synthesis and Characterization of Nickel and Zinc Ferrite Nanocatalysts for Decomposition of CO2 Greenhouse Effect Gas

2013 ◽  
Vol 13 (4) ◽  
pp. 2538-2548 ◽  
Author(s):  
Kuen-Song Lin ◽  
Abhijit Krishna Adhikari ◽  
Chi-Yu Wang ◽  
Pei-Ju Hsu ◽  
Ho-Yan Chan
Keyword(s):  
Greenhouse Effect ◽  
Zinc Ferrite ◽  
Synthesis And Characterization ◽  
Greenhouse Effect Gas

Theoretical Investigation of Radiative Transport and Heat Transfer of Nanofluids in a Direct Solar Absorption Collector

2010 ◽  
Author(s):  
Qunzhi Zhu ◽  
Yongguang Li ◽  
Lijuan Mu ◽  
Yun Cui
Keyword(s):  
Heat Transfer ◽  
Solar Radiation ◽  
Theoretical Investigation ◽  
Temperature Increase ◽  
Solar Collector ◽  
Solar Spectrum ◽  
Radiative Properties ◽  
Solar Absorption ◽  
Average Temperature ◽  
Calculated Average

Conversion of solar energy into heat is a common way to explore the clean and renewable energy source. Generally, a spectrally selective coating should be deposited to the solar-absorbing surface of the solar collector in order to reduce thermal loss emitted away from the surface in the form of thermal radiation. Nanofluids can be filled into a flat plate solar collector to absorb the solar radiation directly. The absorbance of the nanofluid in the solar spectrum may be tuned by various nanoparticles of different materials, sizes and mass fractions. In this paper, a theoretical investigation is carried out to model absorption, scattering and extinction of solar radiation within the nanofluid and to model the heat transfer within the liquid film in the direct solar absorption collector. The predicted extinction coefficient is much lower than the measured value in visible spectrum for the SiO2-water nanofluid. The calculated average temperature increase in the outlet of the collector using the measured radiative properties agrees with the measured value while that applying the predicted radiative properties is significantly lower. Nevertheless, the agreement in the predicted and the measured extinction coefficients of the TiO2-water nanofluid is reasonably good within the solar spectrum. The calculated average temperature increase is close to the measurement value. This work is helpful to understand radiative transport and heat transfer of direct solar absorption collectors using nanofluids.

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