Design and verification of an intelligent energy efficiency testing device for multi-station storage electric water heaters

To address the pain points of traditional energy efficiency testing for storage water heaters—such as reliance on manual operation, complex procedures, poor equipment compatibility, long testing cycles, and the inability to perform synchronous multi-unit tests—a high-efficiency, accurate, and intelligent testing device was designed and developed. The device automatically measures the 24-hour standing loss coefficient and hot water output rate. Verification results indicate that the repeatability of five consecutive hot water output rate measurements is no more than 2.0%. The device supports parallel testing across multiple stations, utilizes intelligent weighing to replace manual handling, and employs programmed control for precise data acquisition and result determination, thus achieving an integrated solution for intelligent testing.