Abstract
Gasification of crop residues can provide modern energy carriers to rural areas at potentially attractive costs along with substantial environmental benefits. Such possibilities are illustrated here by modeling a village-scale “trigeneration system” for a hypothetical village in northern China to provide clean cooking fuel, hot water for heating, and electricity. The electricity and hot water would be provided by a microturbine operated in the combined heat and power mode. The cooking fuel and hot water would be distributed by underground pipes to individual houses in the village. Overall system economics would be most favorable when the microturbine is operated as a baseload power-generating unit. Because of low village electricity demand levels, this mode of operation requires selling most of the generated electricity into the electric grid. Prospective generating costs would be sufficiently low to make this option attractive as a source of grid electricity, but policies are needed that allow such village generators to sell their electricity into the grid at prices that reflect its value.
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