Cooler Equatorial Climate in the Late Lopingian Estimated from Paleosols Developed on Emeishan Basalts

2021 ◽  
Author(s):  
Maochao Zhang ◽  
Zheng Gong ◽  
Yu Zhou ◽  
Yanmei Liu ◽  
Jun Li ◽  
...  
Keyword(s):  
Equatorial Climate

Performance assessment of free standing and building integrated grid connected photovoltaic system for southern part of India

2020 ◽  
pp. 014362442097774
Author(s):  
VS Chandrika ◽  
M Mohamed Thalib ◽  
Alagar Karthick ◽  
Ravishankar Sathyamurthy ◽  
A Muthu Manokar ◽  
...  
Keyword(s):  
Geographical Location ◽  
Photovoltaic System ◽  
Building Structures ◽  
System Efficiency ◽  
Pv System ◽  
Free Standing ◽  
Pv Module ◽  
Building Integrated Photovoltaic ◽  
Community Buildings ◽  
Equatorial Climate

Photovoltaic (PV) system efficiency depends on the geographical location and the orientation of the building. Until installing the building structures, the integration of the PV module must be evaluated with ventilation and without ventilation effects. This work optimises the performance of the 250 kWp grid-connected photovoltaic (GPV) for community buildings in the southern part of India. This simulation is carried out to evaluate the system efficiency of the GPV system under various ventilation conditions, such as free-standing PV (FSPV), building integrated photovoltaic ventilated (BIPV_V) and Building Integrated Photovoltaic without ventilation (BIPV). The PVsyst simulation tool is used to simulate and optimise the performance of the system with FSPV, BIPV and BIPV_V for the region of Chennai (13.2789° N, 80.2623° E), Tamilnadu, India. An annual system energy production is 446 MWh, 409 MWh and 428 MWh of FSPV, BIPV and BIPV_V system respectively. while electrical efficiency for the FSPV, BIPV_V, BIPV system is 15.45%. 15.25% and 14.75% respectively. Practical application: Integrating the grid connected photovoltaic system on the building reduces the energy consumption in the building. The integration of the PV on the roof or semi integrated on the roof is need to be investigated before installing on the buildings. The need for installation of the BIPV with ventilation is explored. This study will assist architects and wider community to design buildings roofs with GPV system which are more aesthetic and account for noise protection and thermal insulation in the region of equatorial climate zones.

Techno-economic evaluation of roof thermal insulation for a hypermarket in equatorial climate: Malaysia

2017 ◽  
Vol 35 ◽  
pp. 209-223
Author(s):  
Sau Wai Lee ◽  
Chin Haw Lim ◽  
Seong Aun Chan ◽  
Kok Leong Von
Keyword(s):  
Economic Evaluation ◽  
Thermal Insulation ◽  
Equatorial Climate

scholarly journals Methodology to Determine Photovoltaic Inverter Conversion Efficiency for the Equatorial Region

2019 ◽  
Vol 10 (1) ◽  
pp. 201
Author(s):  
Azhan Ab. Rahman ◽  
Zainal Salam ◽  
Sulaiman Shaari ◽  
Mohd Zulkifli Ramli
Keyword(s):  
Conversion Efficiency ◽  
Peak Power ◽  
Climatic Conditions ◽  
Equatorial Region ◽  
Photovoltaic System ◽  
Energy Yield ◽  
Peak Efficiency ◽  
Pv Systems ◽  
One Year ◽  
Equatorial Climate

Photovoltaic inverter conversion efficiency is closely related to the energy yield of a photovoltaic system. Usually, the peak efficiency (ηmax) value from the inverter data sheet is used, but it is inaccurate because the inverter rarely operates at the peak power. The weighted efficiency is a preferable alternative as it inherently considers the power conversion characteristics of the inverter when subjected to varying irradiance. However, since the weighted efficiency is influenced by irradiance, its value may not be appropriate for different climatic conditions. Based on this premise, this work investigates the non-suitability of the European weighted efficiency (ηEURO) for inverters installed in the Equatorial region. It utilizes a one year data from the Equatorial irradiance profile to recalculate the value of ηEURO (ηEURO_recal) and to compare it with the original ηEURO. Furthermore, a new weighted efficiency formula for the Equatorial climate (ηEQUA) is proposed. Validation results showed that calculated energy yield with ηEQUA closely matched the real energy yield of 3 kW system with only 0.16% difference. It is envisaged that the usage of ηEQUA instead of ηmax or ηEURO will results in a more accurate energy yield and return of investment calculations for PV systems installed in Equatorial regions.

Sympatric occurrence and population dynamics of Scylla spp. in equatorial climate: Effects of rainfall, temperature and lunar phase

2017 ◽  
Vol 198 ◽  
pp. 299-310 ◽  
Author(s):  
Hanafiah Fazhan ◽  
Khor Waiho ◽  
Mohammad Farhan Darin Azri ◽  
Ismail Al-Hafiz ◽  
Wan Ibrahim Wan Norfaizza ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Lunar Phase ◽  
Climate Effects ◽  
Equatorial Climate

Predictable timing of oestrus in the tropical bat Saccopteryx bilineata living in a Costa Rican rain forest

2011 ◽  
Vol 27 (2) ◽  
pp. 121-131 ◽  
Author(s):  
Sabine Greiner ◽  
Franz Schwarzenberger ◽  
Christian C. Voigt
Keyword(s):  
Climatic Factors ◽  
Costa Rican ◽  
Seasonal Reproduction ◽  
Female Reproduction ◽  
Short Term ◽  
Saccopteryx Bilineata ◽  
Progesterone Metabolites ◽  
Equatorial Climate ◽  
The Tropics

Abstract:Many tropical mammals reproduce seasonally, although the circum-equatorial climate is more stable and less seasonal than that of temperate zones. The mechanisms underlying seasonal reproduction in the tropics remain enigmatic. Female reproduction and its relation to environmental factors were investigated in the Neotropical bat species Saccopteryx bilineata. Colonies consist of year-round stable groups of several females that are defended each by an adult male. Females give birth to a single offspring each year and it is suggested that mating is restricted to November and December. In this study, it was asked whether females of a Costa Rican colony come into oestrus around the same time each year and whether oestrus times are synchronized. Oestrogen and progesterone metabolites were monitored from faeces between October and January in four years. Oestrus was identified in 32 females. In addition, climatic factors such as rainfall and temperature were monitored at the study site. Results indicate that (1) females exhibit monoestry, (2) oestrus dates cluster around the first half of December, (3) reproduction is strongly seasonal and highly predictable and (4) oestrus times are possibly influenced by long-term cues like photoperiod and short-term cues like sudden changes in rainfall and temperature.

Statistics of annual and diurnal cloud attenuation over equatorial climate

2009 ◽  
Vol 3 (4) ◽  
pp. 630 ◽  
Author(s):  
J.S. Mandeep ◽  
J.S. Ojo ◽  
L.D. Emiliani
Keyword(s):  
Cloud Attenuation ◽  
Equatorial Climate
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