The constant flow primary only system and constant-flow-primary / variable-flow secondary chilled water systems are generally considered to be traditional design methodologies while the variable primary flow chilled water system is considered as sustainable design methodology. This case study investigates and compares the energy, economic and environmental advantages of sustainable chilled water plant design methodologies with traditional design methods in Saudi Arabia. Session 18 Paper 3, Heriot-Watt University Edinburgh, 14-15 April 2016ĭownload full paper using download links above or download slides