摘要:

This paper presents an investigation of a three zone solar pond with a diffusely reflecting bottom under two modes of heat extraction viz. constant flow rate of the heat removal fluid and heat retrieval zone at constant temperature. At a typical flow rate of 10-3kg/s m2, optimal heat retrieval efficiencies of 32.4% (at non-convective zone depth, l-2 = 1.25m), 25.2% (at l-2 = 0.75m) and 21.5% (at l-2 = 0.6m) are predicted at bottom reflectivities of 0.0, 0.5 and 0.8 respectively. In the mode of heat retrieval at constant temperature, efficiencies of 32.5% and 23.5% are obtained at extraction temperatures of 40°C and 100°C respectively for R = 0.0. However, these values of efficiency go down to 22.3% and 12.4% respectively for a typical value of R = 0.6.

ISSN:0142-5919    

DOI:10.1080/01425918208909902

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

The Danish Government supports producers of systems for renewable energy sources (solar, wind, biomass). At present the consumer will receive 30% of the investments in the installed solar heating system. In order to participate in this arrangement it is required of the producers that the components of their solar heating systems are tested. The heat storages are tested at the Thermal Insulation Laboratory at the Technical University of Denmark. Tests of marketed heat storages for solar heating systems for domestic hot water supply started in 1979, and since then the test procedures have been changed continuously according to the experience gained. The test procedure in use now and some of the experiences gained will be described in the following.

ISSN:0142-5919    

DOI:10.1080/01425918208909903

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Le comportement d'un amas de mais soumis à la double influence d'un flux radiatif et d'une convection forcée d'air chaud est étudié en fonction des principaux paramètres du système. Deux possibilityés de recyclage de I'air dans le séchoir sont également envisagées.

ISSN:0142-5919    

DOI:10.1080/01425918208909904

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

L'objet de cette communication est de proposer et de définir un indice simple permeitant de caractériser et de diffeacute;rencier, au niveau de la meacute;soeacute;chelle, des reacute;gions climatiques selon des crit`eres adapteacute;s aux applications heacute;liothermiques.

ISSN:0142-5919    

DOI:10.1080/01425918208909905

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

摘要:

Airless spray consists in strongly compressing a liquid in a cylinder fitted with a nozzle. The droplets of liquid which are ejected can be pyrolized on a heated substrate. The technique was applied to the elaboration of CdS-Cu2S photocells. A comparison with classic spray is given. There is an important decrease in energy consumption and spray time and the photocell properties are comparable.

ISSN:0142-5919    

DOI:10.1080/01425918208909906

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0142-5919    

DOI:10.1080/01425918208909907

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor

ISSN:0142-5919    

DOI:10.1080/01425918208909908

出版商:Taylor & Francis Group    

年代:1982

数据来源: Taylor