Two stage single gas cooler HVAC cycle

A coolant cycle system for cooling a structure comprising:

• a two stage compressor configured to compress a coolant and having a first stage with a first stage inlet and a first stage outlet and a second stage with a second stage inlet and a second stage outlet, wherein the second stage is a high pressure stage relative to the first stage;
• a gas cooler having a coolant inlet fluidly connected to the second stage outlet and having a gas cooler outlet;
• the gas cooler outlet being fluidly connected to a heat exchanger and a fluid storage tank via a split that is upstream of the heat exchanger and the fluid storage tank, the heat exchanger being configured to cool the fluid storage tank and having a heat exchanger coolant outlet fluidly connected to the second stage inlet, wherein the split comprises a first fluid connection path to pass a portion of cooled compressed coolant exiting the gas cooler outlet to a fluid storage tank inlet and a second fluid connection path to pass a remainder of the cooled compressed coolant exiting the gas cooler outlet to a heat exchanger inlet;
• the fluid storage tank having a fluid storage tank outlet fluidly connected to a coolant inlet of an evaporator;
• a coolant outlet of the evaporator being fluidly connected to the first stage inlet of the two stage compressor;
• and
• wherein the first stage outlet of the two stage compressor is fluidly connected to the second stage inlet.