New York MTA Tests Startup's Radiant Cooling in Subway Stations

The New York Metropolitan Transportation Authority (MTA) has launched a pilot program at the East Broadway subway station to test a novel radiant cooling system designed to mitigate extreme heat. Developed by startup Cascara Energy, the technology aims to make station environments more comfortable for passengers.

Unlike traditional air conditioning, the system uses pipes installed in ceiling arches and behind grates. Chilled water or refrigerant circulates through these pipes, absorbing heat from the air and surfaces, thereby cooling the space. The MTA estimates the system uses 25–35% less energy than conventional AC. Instead of blowing cold air, it directly cools people and surfaces by radiating coolness, making it less susceptible to heat introduced by open staircases or subway cars.

"We are keenly aware, especially when we get into the heat of summer, about the impact of climate change on our customers and our infrastructure," said Jamie Torres-Springer, president of MTA construction and development. He described the iniative as an experimental approach to address the unique challenges of cooling an old, subterranean system, which is further complicated by heat from trains and the open-air entrances.

Over the next year, the performance of the system will be monitored in a 93-square-meter test area. The objective is not to achieve a cold temperature, but a more comfortable 29 degrees Celsius, even as heat continues to enter the station. The pilot will also assess the potential for reusing the captured waste heat to warm nearby buildings.

The MTA is also exploring alternative cooling methods, such as geothermal systems, and increasing train service frequency as ways to enhance passenger comfort during hot weather. Despite the potential of this pilot, no decisions have been made regarding a wider rollout of Cascara Energy's technology.