scholarly journals Geothermal Energy Potential for Cooling/Heating Greenhouses in Hot Arid Regions

Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 105
Author(s):  
Ibrahim Al-Helal ◽  
Abdullah Alsadon ◽  
Samy Marey ◽  
Abdullah Ibrahim ◽  
Mohamed Shady ◽  
...  
Keyword(s):  
Water Vapour ◽  
Arid Regions ◽  
Energy Potential ◽  
Indoor Space ◽  
Lack Of Information ◽  
Space Cooling ◽  
Heating Capacity ◽  
Optimum Depth ◽  
One Year ◽  
Vapour Condensation

In arid regions, drastic seasonal variations in the climatic parameters are common; thus, a high potential of geothermal effects for heating/cooling applications is expected. However, such applications are very limited in these regions due to the lack of information about underground temperature profiles of the surface and shallow zones. Therefore, this study aims to (i) measure the underground temperature profile for one year to determine the optimum depth for burying EAHE pipes; (ii) examine the possibility of water vapour condensation occurring in the buried EAHE pipes, if the air let into the pipes was humid; and (iii) quantify the maximum cooling/heating capacity, if an EAHE was implemented. The results show that a 3-meter depth is optimal to bury EAHE pipes, where the ground temperature is 32 °C in the summer and 29 °C in the winter. These temperatures would provide a maximum cooling/heating capacity of 1000/890 MJ day−1 for each 1 m3 of humid air exhausted from a greenhouse. If the EAHE were to operate in a closed loop with a greenhouse, the condensation of water vapour in the EAHE pipes would be impossible during the cooling process. The results of this study are useful for designers using geothermal effects for indoor space cooling and heating in arid regions.

Aspects of reproduction, and morphology of the penis, of Pseudantechinus woolleyae (Marsupialia : Dasyuridae)

2017 ◽  
Vol 65 (6) ◽  
pp. 357 ◽  
Author(s):  
P. A. Woolley
Keyword(s):  
Western Australia ◽  
Arid Regions ◽  
Wide Distribution ◽  
Erectile Tissue ◽  
Australian Museum ◽  
Seasonal Breeder ◽  
Males And Females ◽  
One Year ◽  
Western Australian

Woolley’s Pseudantechinus, P. woolleyae, has remained virtually unstudied in the 30 years since its recognition in 1988 as a species distinct from P. macdonnellensis. It has a wide distribution in arid regions of Western Australia. What little is known of its biology comes largely from studies carried out over the years 1988–91 on one wild-caught female and her offspring, and a few specimens held in the collection of the Western Australian Museum. P. woolleyae is a seasonal breeder and young are born from late July to early October. They mature when ~7 months old. Both males and females are potentially capable of breeding in more than one year. Males have accessory erectile tissue that does not form an appendage on the penis.

Comparison of water vapour condensation in vertically oriented pipes of condensers with internal and external heat rejection

Energy ◽  
2020 ◽  
Vol 208 ◽  
pp. 118388
Author(s):  
Filip Toman ◽  
Petr Kracík ◽  
Jiří Pospíšil ◽  
Michal Špiláček
Keyword(s):  
Water Vapour ◽  
External Heat ◽  
Heat Rejection ◽  
Vapour Condensation

Experiments on water vapour condensation within supersonic nozzle flow generated by an impulse tunnel

2021 ◽  
Vol 134 ◽  
pp. 103473
Author(s):  
Jafar Mahmoudian ◽  
Federico Mazzelli ◽  
Adriano Milazzo ◽  
Ray Malpress ◽  
David R. Buttsworth
Keyword(s):  
Water Vapour ◽  
Supersonic Nozzle ◽  
Nozzle Flow ◽  
Vapour Condensation

scholarly journals Tropospheric water vapour and relative humidity profiles from lidar and microwave radiometry

2013 ◽  
Vol 6 (6) ◽  
pp. 10481-10510
Author(s):  
F. Navas-Guzmán ◽  
J. Fernández-Gálvez ◽  
M. J. Granados-Muñoz ◽  
J. L. Guerrero-Rascado ◽  
J. A. Bravo-Aranda ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Water Vapour ◽  
Microwave Radiometer ◽  
Radiosonde Data ◽  
Mixing Ratio ◽  
Raman Lidar ◽  
New Approach ◽  
Lidar Measurements ◽  
One Year ◽  
Humidity Profiles

Abstract. In this paper, we outline an iterative method to calibrate the water vapour mixing ratio profiles retrieved from Raman lidar measurements. Simultaneous and co-located radiosonde data are used for this purpose and the calibration results obtained during a radiosonde campaign performed in Summer and Autumn 2011 are presented. The water vapour profiles measured during nighttime by the Raman lidar and radiosondes are compared and the differences between the methodologies are discussed. Moreover, a new approach to obtain relative humidity profiles by combination of simultaneous profiles of temperature (retrieved from a microwave radiometer) and water vapour mixing ratio (from a Raman lidar) is addressed. In the last part of this work, a statistical analysis of water vapour mixing ratio and relative humidity profiles obtained during one year of simultaneous measurements is presented.

scholarly journals BIOMASS: An Underrated and Deprioritized Energy Potential

2019 ◽  
Vol 2 (3) ◽  
Keyword(s):  
Waste Materials ◽  
Primary Reason ◽  
Energy Potential ◽  
Lack Of Information

It is pleasing to know that Biomass which is commonly regarded as waste materials are being explored all around the globe for the development of mankind. Unfortunately, some regions with biomass as their strongest and main energy potential are not benefiting from this energy opportunity. It is worrisome to know that these countries still suffer from insufficient electricity as well as some failure in agriculture caused by unavailability of fertilizer. This unfortunate incidence is caused by lack of information which is the primary reason for underrating and deprioritizing Biomass.

scholarly journals Solar Dryer for Large/Medium Scale Ripening and Drying of Dates; A Case Study of Dates Growing Area of Pakistan

2021 ◽  
Vol 64 (1) ◽  
pp. 30-37
Author(s):  
Saeeda Sultana ◽  
Syed Hussain ◽  
Muhammad Farooq ◽  
Muhammad Ehsan
Keyword(s):  
Natural Gas ◽  
Solar Thermal ◽  
Medium Scale ◽  
Solar Dryer ◽  
Lack Of Information ◽  
Sunshine Hours ◽  
And Performance ◽  
One Year

This study describe the design features and performance of the unglazed transpired solar dryer for large and medium scale drying of Dates in the Dates growing area of Pakistan. The dryer has the designed capacity to dry 500 Kg of Dates from Khalaal (70% humidity) to Tamar (25% humidity), at 55 C ± 5 C in 72 continuous hours using biomass furnace as an auxiliary heat source and it covers approximately 256 m2 areas. This is the ideal humidity condition to store Dates for one year without any further degradation. In traditional open sunshine the huge quantity of Dates are dried in over 150 h hours and requires hectare of area to spread the Dates. Moreover, the quality of Dates in the open sunshine is affected badly due to two main reasons. Firstly, the heavy dust in the area that sticks the Dates during the drying process makes them unable to eat. Secondly, the Monsoon rains in the months of July and August also destroys Dates placed in the open areas for drying. Dera Ismail (D.I.) Khan, a remote district of Khyber Pakhtoon Khawa province of Pakistan, was selected to study the performance of Dates dryer, where solar insolation is 700-750 W/m2 in the months of July and August. The Dates were dried continuously and during off sunshine hours biomass auxiliary source was used. This solar dryer, containing eight trolleys and each trolley is loaded with twelve trays, is the first in Pakistan to dry a large amount of Dates. Moreover, the unglazed transpired dryer is designed in such a way that it can withstand the dusty atmosphere of D.I. Khan and also protect the Dates from dust and rainy water during the drying period. The design does not have any adverse effect on the quality of dried Dates. In D.I. Khan around 350 days are sunny per year and solar thermal technology is economically feasible compared to other conventional energy resources with a payback period of 3 and 7.5 years compared to un-subsided and subsided cost of Natural Gas respectively. The Natural Gas is the cheapest conventional energy source in Pakistan. But solar thermal technology is yet not popular source of energy in the area due to lack of information, fear of initial capital cost and weak government policies for renewable energies. This study also incorporates the recommendations to overcome these issues regarding Solar Thermal Technology, PACS Number: 44.40.+a, 89.30.Cc, 84.60.- h, 89.30.-g.   

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