Heat Pump Systems and Methods
Provided herein are methods and systems for generating steam. The methods may comprise circulating a first working fluid through a first heat pump cycle, circulating a second working fluid through a second heat pump cycle, and transferring heat from said first working fluid to said second working fluid in a heat exchanger coupled to the first heat pump cycle and the second heat pump cycle. In some embodiments, the first heat pump cycle receives heat from an ambient air stream.
1 . A method for generating steam using a cascading heat pump system comprising a heat transfer fluid cycle, a first heat pump cycle, and a second heat pump cycle, the method comprising:
circulating a heat transfer fluid through the heat transfer fluid cycle;
circulating the first working fluid through the first heat pump cycle; and
circulating the second working fluid through the second heat pump cycle.