21 years on, Cornell’s lake source cooling project [at 983 East Shore Drive] has more than proven its worth.
Substantial long-term cost savings and carbon-emission reductions
By Deirdre Lord, Robert R. Bland, and Angela Zeng
Winter 2022
Overview:
"The introduction of lake source cooling in 2000 ushered in a new era of sustainability for Cornell’s chilled-water system (Figure 3). The project involved decommissioning two of three campus cooling plants, including all five system chillers using ozone-depleting chlorofluorocarbon refrigerants. One plant remains in operation equipped with three ozone-friendly hydrochlorofluorocarbon chillers that, together with a 4.4 million-gal thermal energy storage tank, can be tapped to meet peak loads or as backup to LSC.
The system draws water from Cayuga Lake through a screened intake about 10 feet above the lake bottom at a water depth of 250 feet. At 39 to 41 degrees F year-round, the water is piped to the onshore heat exchange facility where its coldness is transferred to the campus chilled-water loop. This water is then returned to the lake at 50 to 55 degrees F through a diffuser 500 feet offshore at a water depth of 10 feet. No chemicals are added to the recirculated lake water.
The environmental impact of LSC on Cayuga Lake is continually assessed and monitored, including by Cornell’s faculty Technical Review Committee. The New York Department of Environmental Conservation has also continued over 20-plus years to determine that the system is not a significant contributor to water quality impairment, leaving Cornell’s LSC permit in effect."
Note: The lake source cooling plant occupies land on which 4 small cottages stood: 983, 985, 987, and 989 East Shore Dr.