 In other schemes, the rising vapor is used in a gas lift technique of lifting water to significant heights.Depending on the embodiment, such vapor lift pump techniques generate power from a hydroelectric turbine either before or after the pump is used.In 1984, the "Solar Energy Research Institute" (now known as the National Renewable Energy Laboratory) developed a vertical-spout evaporator to convert warm seawater into low-pressure steam for open-cycle plants.