摘要:

A description is given of a model device for converting the approaching kinetic energy of wind or water streams directly to the oscillating motion of a mechanism. It is estimated that large scale versions would produce sufficient power to support isolated installations, eg radio or meteorological buoys in coastal waters, or pumping sets for irrigation purposes in arid regions. The flow about the model is unsteady and is closely related to that present in vertical axis wind-turbine rotors and some other similar devices. A description of the flow is given using a flow visualisation technique. An approximate expression is derived for the output torque.

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675738

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Solar stills have been designed to produce water for use in teaching and research laboratories. Various designs and configurations have been constructed and tested over the past 10 years. The original double-surfaced cascade stills (stills A and B) were constructed in aluminium and were rather expensive. Later models termed Series D and E were of galvanised mild steel with stainless steel distillate drains and safety overflow drains. These galvanised steel units suffered from severe corrosion after a few years of operation. The latest design series F, is built in aluminium with stainless steel distillate drains and automatic feed valves. All of the stills produce very pure distilled water (conductance ∼1.5 × 10−6Ω−1cm−1; pH 6.8–7.4) at a cost which is below that of conventional electrically heated stills.

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675739

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675740

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

Several solar water heating systems have been developed. The collecting systems are mostly of a non-selective nature, and are therefore suitable only for low-temperature applications. The performance of two types of water heater are discussed, one with reflectors but non-selective and the other using a selectively coated collector. The former delivers two litres of boiling water every 15–20 min. The latter is a sulphide coated collector to be used for heating water up to a temperature around 90–95°C. The method of preparation of the sulphide coating is given.

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675741

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

摘要:

A survey of energy use on Mauritius was carried out during the period July–September 1979. It shows that the island is dependent on oil for 90% of its energy supplies and that about half of the energy consumed is used for transport. The potential for developing renewable energy sources in Mauritius is considered and it is shown that solar water-heating and the use of sugar by-products could make significant contributions to the future energy economy of the island.

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675742

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675743

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675744

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675745

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675746

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor

ISSN:0143-0750    

DOI:10.1080/01430750.1980.9675737

出版商:Taylor & Francis Group    

年代:1980

数据来源: Taylor