With the discussion of alternative energies on the rise due to climate change − existing energy utilities may be hesitant to change, due to the immense cost to and lack of experience in this new realm to retrofit. Yet, these existing industries can participate in the conversation by increasing their efficiencies and reallocating their resources to reduce the consumption of fossil fuels to their furthest potential. It has been increasingly recognized that the recovery of wasted energy is the creation of new energy. Therefore, regardless it is traditional energy source or alternative energies, the need to achieve their highest level of efficiencies is fundamentally critical to make the energy industry "greener." This study examines a case study through field data on how the undelivered energy in a moderate- to high-pressure steam and chilled water generation plant can be recovered using data-driven analysis, thus improving the overall efficiency of a district energy system. The research ultimately aims to develop an intelligent feedback control system that potentially transfers the benefit of energy efficiency measures to the stakeholders of the system, including energy producers, end users and infrastructure investors.