Lenovo Neptune Direct Water-Cooling Standards

This technical report outlines the Lenovo Neptune Direct Water-Cooling Standards, which detail the implementation of liquid cooling solutions for data center servers. The document describes the necessity of liquid cooling in high-performance computing systems, particularly as processing power and packaging density have increased significantly. It explains the direct water cooling process, which involves circulating cooling water through cold plates that contact high-heat-producing components. The report also references industry standards from ASHRAE and the Open Compute Project, which provide guidelines for liquid cooling systems. Lenovo categorizes its cooling solutions into three tiers—Gold, Silver, and Bronze—based on performance and efficiency metrics. Each tier is defined by specific parameters such as ambient room temperature, facility water system temperatures, and cooling infrastructure requirements. The report aims to provide a comprehensive solution matrix that assists customers in selecting appropriate liquid cooling systems for their data center environments.