Energy Assessment Technique for Retrofit Mine-water District Heat Network

UK buildings and energy infrastructures are heavily dependent on natural gas, a large proportion of which is used for space heating. Much of the UKs' gas is imported, therefore a wholesale shift in energy provision is required in order to meet government targets for reducing carbon emissions and improving energy security, without impacting on thermal comfort levels, convenience or cost of supply to the end user. Heat pumps are a potential alternative for modern well insulated homes, however this is not necessarily true of a large proportion of British housing stock which was built prior to 1919. Increasing energy efficiency of older properties remains a significant challenge, which cannot be achieved through insulation and air-tightness interventions alone. This paper investigates the energy demand of pre-1919 dwellings using a holistic surveying approach to provide a more accurate assessment of total household heat demand, and reports on the analysis of eight properties. This information is used to assess the feasibility of using water from disused mine workings to supply a heat pump based, district heat network. The use of renewable solar energy generation and storage technologies, to reduce the heat load and offset increased electricity demand, are also considered

Holistic Dwelling Energy Assessment Protocol for Mine-water District Heat Network

UK buildings and energy infrastructures are heavily dependent on natural gas, and a large proportion is used for domestic space heating; but 50% is imported. Improving energy security and reducing carbon emissions are major government drivers for reducing gas dependency. So, there needs to be a wholesale shift in the energy provision to householders without impacting on thermal comfort levels, convenience or cost of supply. Electrical powered heat pumps are seen as a potential alternative system for heating new dwellings, but will they work in dwellings built prior to 1919? This paper investigates the energy demand of pre-1919 dwellings in Wales, UK as part of a feasibility study to extract water from disused coal mines to supply a district heat network. A holistic surveying protocol providing a more accurate/realistic assessment of total household heat demand is considered. The protocol’s techniques include condition surveys, air permeability and thermography tests, and heat loss calculations are discussed. The results were used to predict future (beyond 2019) heat demand after potential retrofit improvements, thereby informing the size of heat pumps required. The findings show estimated heat demand to be in close correlation to household energy bills, and that the use of heat pumps in pre-1919 dwellings is viable, provided sufficient improvement to thermal performance is possible

Recent achievements in speech processing technologies and their applications

As speech is the most natural form of human communication, there has been much interest in using it to communicate with machines, although the considerable processing power required has made it difficult to achieve this goal. Now advances in microprocessor technology have made it possible to build speech recognition and synthesis systems for a number of useful real-time applications

Digitale Sprachuebertragung mit niedriger Bitrate

SIGLEDEGerman

Texturierte YBCO-Hochtemperatur-Supraleiter. Untersuchung zur Abschaetzung der Moeglichkeiten von schmelztexturierten YBCO-Hochtemperatursupraleitern in energietechnischen Anwendungen

The potential uses of melt textured, high-temperature superconductors in energy technology are shown in great detail, with emphasis on applications for magnetic bearings, magnetic field shielding, and permanent magnets. The study is an up-to-date survey of potential applications, of interest to R+D labs as well as potential users in science and technology. (orig.)Die vorliegende Untersuchung behandelt das energietechnische Anwendungspotential von schmelztexturierten Hochtemperatur-Supraleitern insbesondere in den Gebieten der magnetischen Lagerung, der Magnetfeldabschirmung und der Permanentmagnete. Sie soll damit potentiellen Anwendern, Entwicklern und weiteren Interessenten einen aktuellen Ueberblick ueber den derzeitigen Stand vermitteln. (orig.)SIGLEAvailable from TIB Hannover: F95B1897+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Entwicklung eines digitalen Signalprozessors

With 16 refs., 5 tabs. and 64 figs.SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Entwicklung eines digitalen Signalprozessors

With 16 refs., 5 tabs. and 64 figs.SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman