Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1941-42 /

Includes index.

Federal legislation, rulings, and regulations affecting the state agricultural experiment stations /

Includes index.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1943-44 /

Cover title.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1944-45 /

Includes index.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1947-48 /

Includes index.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1948-49 /

Includes index.

Annual report of the Experiment Station at the Kansas State Agricultural College for the fiscal year ... including bulletins ...

Contain also Bulletins and Reports of the director.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1942-43 /

Includes index.

Workers in subjects pertaining to agriculture in land-grant colleges and experiment stations, 1945-46 /

Includes index.

Workers in subjects pertaining to agriculture in land-grant colleges and agricultural experiment stations : 1956-57.

Mode of access: Internet.

Combined production of sugar, ethanol and electricity: Thermoeconomic and environmental analysis and optimization

Many works have shown the potential of the Brazilian sugarcane industry as an electricity supplier. However, few studies have studied how this potential could be achieved without jeopardizing the production of sugar and ethanol. Also, the impact of modifications in the cogeneration plant on the costs of production of sugar and ethanol has not been evaluated. This paper presents an approach to the problem of exergy optimization of cogeneration systems in sugarcane mills. A general model to the sugar and ethanol production processes is developed based on data supplied by a real plant, and an exergy analysis is performed. A discussion is made about the variables that most affect the performance of the processes. Then, a procedure is presented to evaluate modifications in the cogeneration system and in the process, and their impact on the production costs of sugar, ethanol and electricity. Furthermore, a discussion on the renewability of processes is made based on an exergy index of renewability. As a general conclusion, besides adding a new revenue to the mill, the generation of excess electricity improves the exergo-environmental performance of the mill as a whole. (C) 2010 Elsevier Ltd. All rights reserved.

Life cycle assessment and life cycle cost of sugar plants evaporators

The evaporators of sugar plants in Brazil have used carbon steel intensively because of it is, a low priced material, which possesses inferior corrosion resistance. The materials more indicated for the substitution of carbon steel are stainless steels, however they are considered expensive. The environmental and financial performances of evaporator pipes constructed with carbon steel and with types AISI 304 444 and 439 stainless steel were evaluated. For the environmental evaluation, the Life Cycle Assessment (LCA) methodology Was used and it, revealed that stainless steel is more environmentally efficient than carbon steel. The life cycle costing (LCC) technique was the tool chosen for the financial evaluation and it showed that stainless steel is a better investment option compared to carbon steel. The results also indicate that LCA and LCC methodologies must be used together Therefore, it can he seen that safer environmental products can come to be the most profitable investment options.