![]() ![]() Water is not only a good heat sink, it also has an unusual relation between its density and its temperature. Significant energy savings can be realized if heat can instead be transferred to a mass of cooler material with a high capacity for absorbing heat, such as water, eliminating the need for a compressor-based cooling cycle. If it is warmer outside than inside, heat must be pushed “uphill”, a very energy intensive operation. Air conditioning currently consumes 18 percent of US electrical output (Cox, 2006) any technologies that can considerably lower the energy demand of air conditioning will create a significant drop in electrical use and mitigate the associated environmental concerns of greenhouse gas emissions and local air pollution.Ĭonventional air conditioning functions by transferring heat from the air to a chilled medium, and then uses a compressor, motor, and refrigerant to transfer the heat from the chiller medium to the outdoors. ![]() Cooling can be particularly troublesome as it is thermodynamically more difficult than heating and demand is intermittent air conditioning demand can trigger summer brownouts and voltage drops on hot summer afternoons. Air conditioning is required even in temperate areas, as technologies such as lighting and electronic equipment produce significant indoor waste heat that must be vented to the outdoors. In many areas of the world including North America, air conditioning imposes a significant load on local electrical systems. Other locations in which heavy air conditioning users are located next to deep, cold water bodies could use this technology to encourage sustainable building. The City of Toronto's approach, in which many buildings are serviced at once while piggybacking onto existing water piping and pumping capacity, can deliver cost savings on a shorter time span. Diffusion is hindered by the low cost of energy. This technology requires that a client with a large cooling need is situated near a deep, cold body of water, and payback times vary depending on the site. We compare deep water cooling systems in Halifax, Nova Scotia and Toronto, Ontario, and find that this technology has significant ecological benefits and long-term economic benefits. Deep water cooling involves using naturally cold water as a heat sink in a heat exchange system, thereby eliminating the need for conventional air conditioning. ![]()
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