Water electrolysis evaluation system and water electrolysis evaluation method
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- HORIBA LTD
- Filing Date
- 2025-12-11
- Publication Date
- 2026-06-25
Smart Images
Figure JP2025043371_25062026_PF_FP_ABST
Abstract
Claims
1. A water electrolysis evaluation system for evaluating the performance of a test specimen which is a water electrolysis cell stack that generates a predetermined gas by water electrolysis, comprising: a gas extraction line to which one end is connected to the test specimen and for extracting a mixed gas containing the gas generated by water electrolysis and water vapor; and a plurality of dehumidifiers provided in the gas extraction line for cooling and dehumidifying the mixed gas, arranged in sequence such that the cooling temperature on the downstream side is less than or equal to the cooling temperature on the upstream side.
2. The water electrolysis evaluation system according to claim 1, wherein a flow control device for controlling the flow rate of the dehumidified mixed gas or a flow meter for measuring the flow rate of the dehumidified mixed gas is provided downstream of the plurality of dehumidifiers in the gas extraction line.
3. The water electrolysis evaluation system according to claim 1 or 2, wherein the cooling temperatures of the plurality of dehumidifiers are set to be lowest at the downstream dehumidifier.
4. The water electrolysis evaluation system according to claim 3, wherein the cooling temperature of the downstream dehumidifier is set in the range of 1°C to 30°C.
5. The water electrolysis evaluation system according to claim 3 or 4, wherein the plurality of dehumidifiers are of the heat exchange type, each equipped with heat transfer tubes, and further comprises a cooling water supply system connected to a water storage tank for storing cooling water, which supplies the stored cooling water to the heat transfer tubes of the plurality of dehumidifiers, wherein the cooling water supply system supplies the cooling water stored in the water storage tank to the heat transfer tubes of the downstreammost dehumidifier at a predetermined temperature using a cooling device, and supplies it to the heat transfer tubes of at least one of the dehumidifiers located upstream of that, at a temperature equal to or higher than the predetermined temperature.
6. The water electrolysis evaluation system according to claim 5, wherein the water storage tank is a cooling tower.
7. The water electrolysis evaluation system according to any one of claims 1 to 6, further comprising a heating mechanism in the gas extraction line for heating the mixed gas after it has passed through the plurality of dehumidifiers but before it passes through the flow control device or the flow meter.
8. The water electrolysis evaluation system according to claim 2, wherein a backflow prevention mechanism for preventing backflow of condensation water is provided downstream of the flow control device or the flow meter in the gas extraction line.
9. The water electrolysis evaluation system according to any one of claims 1 to 8, further comprising a steam supply line for supplying steam to the test specimen, wherein the upstream end of the steam supply line is connected to a boiler.
10. The water electrolysis evaluation system according to any one of claims 1 to 9, wherein the water electrolysis cell stack is a solid oxide type electrolysis cell stack.
11. A method for evaluating the performance of a test specimen which is a water electrolysis cell stack that generates a predetermined gas by water electrolysis, wherein a plurality of dehumidifiers for cooling and dehumidifying the mixed gas are sequentially provided in a gas extraction line to which one end is connected, and which extracts a mixed gas containing the gas generated by water electrolysis and water vapor, such that the cooling temperature on the downstream side is less than or equal to the cooling temperature on the upstream side.