摘要:

It is the year 2081, AWWA's bicentennial. Stretching across the Great Plains from North Dakota to Texas is a network of 300 000 wind machines. They tower 250 m (850 ft) above the prairies, spaced as closely as one every 3 km2(1 sq mi). Twin‐bladed propellers. 150 m (50 ft) in diameter, capture almost 60 percent of the wind's power, taming it to produce electricity and pump water.Fifteen kilometres (10 mi) off the New England coast is a network of windmills mounted on anchored buoys, continuously generating billions of kilowatts of electricity. The coastal winds yield enough power to supply most of the Eastern Seaboard.Where weather conditions are favorable, water treatment plants and other large industrial facilities are surrounded with towers containing wind‐driven generators. The electricity produced allows industries to reduce the amount of power they draw from electric utilities during expensive peak‐demand periods; during low‐demand periods, industrial power users become power vendors, feeding electricity back into the utilities' grids.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00721.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

One solution to the problem of low water pressure caused by customers' plumbing is a simple pressure gauge mounted and inserted in the service line in place of the meter.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00722.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

This month's “Certification Corner” covers natural water hardness and alkalinity, characteristics of coliform colonies, coagulants, public notification requirements of the National Primary Drinking Water Regulations, aerobic organisms, Venturi tubes, and bacteriological sampling.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00724.x

出版商:Wiley    

年代:1981

数据来源: WILEY