Abstract
Energy conversion which takes place in a stack wetted with water is investigated. To clarify the discussion, two cases for working fluid of only air and air containing water vapor are compared. As a result, three conclusions are obtained: 1. In the case of air only, energy generation depends on temperature gradient; 2. In the case of a mixture of water vapor and air, the energy generation depends on the number-density ratio; 3. The energy generation due to water vapor is around 15 times that due to air. These conclusions are thought to be useful for designing a thermoacoustic system capable of low-temperature driving which uses the stack wetted with water.
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