Philips' Geographical Pictures

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Experimental Characterization of a Supercritical Carbon Dioxide Microchannel Solar Thermal Receiver

Characterization of a microchannel solar thermal receiver for supercritical carbon dioxide (sCO₂) is presented. The receiver design is based on conjugate computational fluid dynamics and heat transfer simulations as well as thermo-mechanical stress analysis. Two lab scale receivers with a 2x2 cm² absorber area are fabricated and experimentally characterized - a parallel microchannel design and a microscale pin fin array design. Static pressure experiments are used to demonstrate receiver integrity at the design pressure of 125 bar at 750°C surface temperature. A concentrated solar simulator was designed and assembled to characterize the thermal performance of the lab scale receiver test articles. Results indicate that, for a fixed exit fluid temperature of 650°C, increase in incident heat flux results in an increase in receiver and thermal efficiency. At a fixed heat flux, efficiency decreases with an increase in receiver surface temperature. The ability to absorb flux of up to 100 W/cm² at thermal efficiency in excess of 90 percent and exit fluid temperature of 650°C using the microchannel receiver is demonstrated. Pressure drop for the pin array at the maximum flow rate for heat transfer experiments is less than 0.64 percent of typical line pressure of 200 bar. Following the successful test of the 2 x 2 cm lab-scale receiver, a larger 8x8 cm² integrated receiver was designed and fabricated. The integrated receiver is shown to withstand 200 bar of static pressure at 600°C. Furthermore, infrared imaging is used to glean the flow distribution from the headers into the microscale region of the receiver. While the integrated receiver could not be tested in the solar simulator due to limitations of the facility, receiver scale-up from 2 x 2 cm to 8 x 8 cm with more effective material usage is demonstrated

Isa A. Roberts Drapery, Grocery, boots and shoes store with bullock team and wagon

Mrs Isa A Roberts was born Isabella Alice Kirwan, Windsor NSW in 1846. She married Mark Roberts in Queensland 16 Aug 1870. Isa Roberts died 1925 and was buried at St George General Cemetery. Mark Roberts was born in Sydney around 1848 and died 24 May 1880 at St George, Queensland. Isa A Roberts was known as a dressmaker in St George and later took over the shop known as Defiance Stores. She left the store in 1918 and it was taken over by Thomas Austin. Earliest reference for the store is in 1909 but that is the same year that the Belonne Beacon began so the store could have been around for longer

Queen Victoria's Royal visit to Dublin, Ireland, 4th April - 26th April, 1900

Peacock Hotel on right , College Green, Trinity College Dublin, God Bless our Queen banner in background , National Assurance Company building. Statue of William of Orange (William III) on College Green, erected in 1701. It was badly damaged in an explosion in 1928, and removed in 1929

ESP administration and ESP teacher training

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/88132/1/swales-esp_administration.pd

Gender and Medieval archaeology: storming the castle

Despite feminist critiques over three decades, Archaeological scholarship remains predominantly focused on exploring patriarchal narratives and is thereby complicit in reinforcing structural inequalities. Questions must be asked of how the construction of archaeological knowledge affects representation and impacts on our ‘archaeologies’. This paper explores the relative absence of gendered approaches within Archaeology through the lens of Later Medieval Archaeology in particular, and with a micro-focus on Castle-studies in Britain and Ireland. Is there a reason for the silence in relation to gender in the archaeology of the later middle ages