The concept of an evacuated flat plate (EFP) collector was proposed over 40 years ago but, despite its professed advantages, very few manufacturers have developed commercial versions. This situation suggests both technical difficulties in manufacturing a competitively-priced sealed for life panel and lack awareness the benefits such panels. paper demonstrates simulation that closely models experimental efficiency measurements. Having established validity model, it compares published data EFP...

A primary drawback of solar thermal technologies, especially in a domestic setting, is that collection energy occurs when irradiance abundant and there generally little requirement for heating. Thermochemical Energy Storage (TCES) offers means storing interseasonally with heat loss. combination Solar Thermal Collector (STC) TCES system will allow variety different heating applications, such as space hot water well low temperature industrial process applications to be met carbon way. This...

Heat losses from a flat panel solar collector can be significantly reduced by lowering the internal pressure to <0.5 Pa. Compared with conventional collectors, resulting increase in efficiency is predicted give significant gain annual heat output context of temperate climate low median irradiance. Two experimental collectors were built and tested investigate theoretical aspects evacuated plates develop appropriate technological solutions. One had metal tray rear, other used two sheets glass....

The concept of an evacuated flat plate collector was proposed over 40 years ago but, despite its professed advantages, very few manufacturers have developed commercial versions. This paper demonstrates the reduction in heat loss coefficient and increase efficiency resulting from evacuating a collector: it is hoped that these results will stimulate interest concept. Evacuated tubes are now mass-produced large numbers; collectors could principle replace if technical difficulties creating...

A flat-plate solar thermal collector's efficiency can be much improved if the enclosure in which absorber is housed evacuated. This would result a high performance, architecturally versatile collector capable of supplying clean energy efficiently for use applications including residential hot water and space heating. paper focuses on design evacuated enclosures collectors, completely surrounded by thin layer (4–10 mm) thermally insulating vacuum, resulting (depth < 20 mm). The expectations,...

Solar thermal collectors for buildings use a heat transfer fluid passing through exchange channels in the absorber. Flat plate absorbers may pass tube bonded to thermally conducting or achieve lower resistance and pressure drop by using flooded panel microchannel design. The should be low minimise power input circulating pump. A method is presented choosing optimum channel hydraulic diameter subject geometric similarity pumping constraints; this an important preliminary design choice any...

The concept of an evacuated flat plate collector was proposed over 40 years ago but, despite its professed advantages, very few manufacturers have developed commercial versions. absorber is a key component collector: in the context panel, design poses number technical challenges. A flooded panel has been designed for use solar collectors. aim to obtain higher efficiency, low out-gassing material, than would be possible using conventional serpentine tube design. Initial plans micro-channel...

A solar simulator has been designed and built for testing prototype (0.5 × 0.5 m) flat plate thermal collectors. An internally reflecting light tube generates multiple virtual images of the four halogen floodlights to ensure uniform illumination. Ray-tracing simulations were used choose dimensions maximum allowable clearance. Illumination measurements agree well with these predictions. The visible & near IR spectrum appears follow a black body curve. In absence "cold sky" filter there is...

Non-concentrating solar thermal collectors are generally available in two forms, flat plate or evacuated tube. Recently a third configuration, the plate, has attracted interest due to enhanced performance and aesthetic characteristics. By isolating absorber vacuum space (<1 Pa) heat loss from can be minimized resulting improved efficiency. In addition insulation of panels over conventional glazing systems makes them attractive solutions for integration into energy efficient building facades....

Creating a vacuum (<1 Pa) around solar absorber in flat plate thermal collector can increase efficiency by minimising gaseous conduction and convection between the glass cover. High performance architecturally attractive collectors are appealing to building owners designers for supplying clean renewable energy cost effectively produced via façade of building. This two part paper describes construction techniques enclosures, fabricated at Ulster University, as prototype components evacuated...

Vacuum flat plate (VFP) solar thermal collectors exhibit excellent optical and characteristics due to a combination of wide surface area high vacuum insulation offering performance architecturally versatile collector with variety applications for industrial process heat building integration. A consists absorber in enclosure comprising glass or metal covers sealed around the periphery an array support pillars maintain separation under atmospheric pressure. The edge seal must be both...

Real-time battery modelling advancements have quickly become required as the adoption of electric vehicles (BEVs) has rapidly increased. In this paper an open-source, improved discrete realisation algorithm, implemented in Julia for creation and simulation reduced-order, real-time capable physics-based models is presented. This work reduces Doyle–Fuller–Newman electrochemical model into continuous-form transfer functions introduces a computationally informed algorithm (CI-DRA) to generate...

The concept of providing an evacuated space between two planar surfaces and exploiting its thermal properties was initially proposed in 1913 for window applications buildings (Zoller, 1913).Since then a number designs the fabrication windows have been investigating sealing methods periphery glass panes maintaining separation under influence atmospheric pressure (Collins et al., 1995).Evacuated also used solar by creating vacuum (less than 0.01mbar) around absorber to reduce convective heat...

Abstract A primary drawback of solar thermal technologies, especially in a domestic setting, is that collection energy occurs when irradiance abundant and there generally little requirement for heating. Thermochemical Energy Storage (TCES) offers means storing interseasonally with very heat loss. combination Solar Thermal Collectors (STC) TCES systems will allow variety different heating applications, such as space hot water well low temperature industrial process applications to be met...

Vacuum flat plate solar thermal collectors offer several advantages over other namely the excellent optical and characteristics they exhibit due to a combination of their wide surface area high vacuum insulation. These can variety applications for industrial process heat as well building integration are much thinner than conventional making installation possible in limited spaces. However, many technical challenges which need be addressed enable scale adoption technology still remain. This...

Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.

This paper discusses the design criteria for a fiber optic augmented solar thermal propulsion system suitable micro satellite platform. Each component is analyzed to determine requirements and conceptual designs are discussed. Model experiment data reported show feasibility. A case study performed derive performance of operating under restrictions UK-DMC satellite.