Encontro de Energia no Meio Rural

Abstract

OCACIA, Gilnei Carvalho, JORGE, Roberlaine Ribeiro, BRISTOTI, Anildo et al. O fator de carga no custo do kwh em micros centrais hidrelétricas isoladas. In Procedings of the 4th Encontro de Energia no Meio Rural, 2002, Campinas (SP) [online]. 2002 [cited 25 April 2024]. Available from: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022002000200031&lng=en&nrm=iso> .

Isolated systems of energy supply assisting a consumer or a group of a same pattern, request a distribution of the load considering schedule restriction for certain uses, reducing the cost of the investment and of the price for kWh. In this work tree cases are analyzed: a) a Small Hydro Power, of 50 KVA, fall of 10m and flow of 900 L.s^-1, supplying energy for eleven houses and for irrigation of melon farmings and operation of a grinding agriculture-industry and production of sausages. b) a Pico Hydro Power, of 5 kVA to energy supply for four residences and illumination points; and,; e, c)a Pico Hydro Power, of 2 kVA, 12 m and 30 L.s^-1, to supply residential energy and for cooling of milk. In the first case, while the monthly energy available would be 36 MWh, only 2,5 MWh is used for residential supply. Therefore the load factor is. The entrance in operation of the agriculture-industry is what will make viable the investment. The supply obeys criteria of priorities. The agriculture-industry should only work during the day, except in the period for irrigation. Heating of water is accomplished in the periods of small demand of the other loads. The freezers should requests start working in the previous night before its use, in order to form a bank of ice. In the second case, there is a readiness of 540 kWh for residence due to the high load factor. On installation (c) the construction of a small accumulation dam allows the electric power generation for a period from 6 to 8 hours daily The load factor is between 25 and 33%. The system is turned on during the period of milk cooling and the spare energy goes to a bank of batteries.