摘要:

The present paper describes two new computer programs, BTS and COMFORT. The first was written to help simulate the performance of a new passive cooling and heating system, designed by the author for buildings in North Africa. BTS is based on a simplified version of the admittance method. The main algorithms empolyed in the program are presented. Finally a validation proceedure was applied against an independent full scale experiment. Good agreement was obtained.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675371

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

This paper describes the methods and the findings of experimental research assessing the quantitative and the qualitative efficiency of shading and shadowing as a direct solar control strategy. The case study is the contemporary individual urban dwelling facade in arid regions. The investigated facade component is the canti-levered volume. A heliodon is used for this simulation. Computation and graphic methods assess the studied facade variants. This work describes a classification of optimal variants of facade and allows recommendations for a shading strategy optimisation according to solar orientation.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675372

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

This paper describes an experimental and theoretical investigation of a non-traditional approach to the air humidification process that uses a hydrophobic membrane contactor acting as a porous barrier between the water and the air to be humidified. The cross-flow contactor consists of a 1.2 m2total membrane surface of hollow polypropylene capillaries, 200 μm wall thickness, arranged in a staggered array.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675373

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

This paper describes the results of experimental studies conducted in Houston, Texas from June 1997 to May 1998 to determine seasonal variations of subsurface ground temperature. The results indicate that the average ambient temperature is 89.31°F (31.84°C) in summer (June–October), and 63.93°F (17.74°C) in winter (November–February). The ground temperature at depths greater than 10 feet remains relatively constant through the year. At a depth of 10 feet (3.04 m), the average ground temperature is 75.12°F (23.96°C) in summer and 75.87°F (24.37°C) in winter. The observed temperature differential between the ambient and the ground temperature at 10 feet is 8–17°F (4.4–9.4°C). The temperature differential suggests that there is potential for pre-heating and pre-cooling the ambient air used in conditioning commercial and institutional buildings. The least square fit equations to project average monthly subsurface ground temperatures are presented.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675374

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

From a review of a number of vernacular and modern environmental solutions and a study of local climatic, social and economic features in North Africa, a new design of roof system is developed. The new system is designed for inducing natural ventilation and cooling in summer and provision of heating in winter. It incorporates a transparent dome and a pitched thermal storage roof. In summer natural air movement is promoted by wind action on the dome apex while the thermal storage roof is used as a heat sink for space cooling. In winter, solar radiation absorbed by the pitched roof components is radiated to the space below in the form of thermal energy. The natural ventilation performance of the new system is investigated using a scale model mounted inside a boundary layer wind tunnel. Development of the thermal storage roof components is carried-out within a Computational Fluid Dynamics software (FLUENT) developed by Fluent Inc. Verification of the computer results is undertaken using real sized models of the pitched roof components and a solar simulator.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675375

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Innogy Technology Ventures Limited, a subsidiary of Innogy plc, has developed a new energy storage technology that is based on a regenerative fuel cell. This differs from conventional battery systems in that the electrochemical species are not part of the electrodes and thus can be stored external to the electrochemical cell. The power (MW) and storage energy (MWh) are therefore separated, which results in significant cost reductions for long storage times. The technology has been proven on a laboratory scale and a full-scale production module (0.7 m2electrode area) has been designed and a number of units are currently under test at a purpose built pilot plant. The module is manufactured from HDPE and carbon, all the components are manufactured by mass production methods, i.e. injection moulding and extrusion and are designed for automated assembly. Subcontractors or alliance partners manufacture the components, while the assembly process is carried out at Innogy plc's premises. The design stage of a 120 MWh plant has been completed and it is envisaged that it will be built, commissioned and operational by spring 2002 at Little Barford Power Station in the UK.

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675376

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675377

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675378

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.2000.9675370

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor