Solar energy and ground-water cooling devices

In apparatus for modifying the temperature of air comprising

• radiant energy collection means for heating liquid,
• storage tank means for storing liquid heated by said radiant energy collection means,
• an air plenum having an associated air impeller means,
• a direct coil positioned in said plenum for imparting temperature change to air passing therethrough,
• first pump means for propelling liquid from and back to said storage tank means,
• heat pump means for extracting heat from liquid passing therethrough when the heat pump means is operating in the compression heating mode and for imparting heat to liquid passing therethrough when the heat pump means is operating in the evaporation cooling mode, said heat pump means having an associated heat pump coil positioned in said plenum for imparting heat to air passing therethrough when said pump is operating in the compression heating mode and for extracting heat from air passing therethrough when said pump is operating in the evaporation cooling mode,
• and associated valve means and conduit means for selectively directing the flow of liquid from said storage tank means to either of said direct coil and said heat pump means and then back to said storage tank means,
• ground-water source means and ground-water return means having a second pump means associated therewith for propelling ground-water from said source means to said return means,
• and associated valve means and conduit means for selectively directing the flow of liquid from said ground-water source means to either as well as both of said direct coil and said heat pump means and then to said ground-water return means.

In apparatus for modifying the temperature of air,

• ground-water source means and ground-water return means,
• heat pump means interconnected with associated air heat exchange means, whereby, when said heat pump is operated in the compression heating mode, heat may be extracted from water being supplied to said heat pump and imparted to said air heat exchanger, and when said heat pump is operated in the evaporation cooling mode, heat may be extracted from said air heat exchanger and imparted to water being supplied to said heat pump,
• a direct coil air heat exchange means comprising a heat exchange coil for transfering heat directly from one fluid to another without utilizing an intermediate fluid or apparatus,
• and valve means and conduit means for selectively directing the flow of water from said ground-water source means to either, as well as both of, said direct coil and heat pump means and then to said ground-water return means.

A method of modifying the temperature of air comprising the steps of

• extracting ground-water from a source,
• causing said extracted ground-water to pass through heat transfer means which includes a heat exchange coil positioned in the plenum of an air duct,
• and returning said ground-water to the earth,
• wherein said step of causing said extracted ground-water to pass through said heat transfer means comprises causing said extracted water to pass through a direct heat exchange coil for transfering heat directly between said ground-water and the air in said plenum without utilizing an intermediate fluid or apparatus.