A power generation system, comprising: an integrated waste heat recovery and cooling cycle system comprising: a heat-to-power portion and an inlet cooling portion in fluid communication with the heat-to-power portion, wherein the heat-to-power portion comprises a two-stage pump/compressor, an intercooler disposed between a first stage and a second stage of the two-stage pump/compressor, one or more recuperators (70, 86) configured to receive a portion of a flow of working fluid, an exhaust heat recovery unit configured to receive the flow of working fluid and an expander disposed downstream of the exhaust heat recovery unit, and wherein the inlet cooling portion comprises a chiller expander, a chiller compressor coupled to the chiller expander, a motor coupled to the chiller compressor and an inlet air heat exchanger in fluid communication with, and intermediately positioned therebetween, the chiller expander and the chiller compressor, the inlet cooling portion configured to receive a portion of the flow of working fluid, a condenser in fluid communication with the heat-to-power portion and the inlet cooling portion; and a working fluid accumulator in fluid communication with the heat-to-power portion and the inlet cooling portion, the accumulator being connected to receive a portion of the working fluid output by the intercooler, the working fluid accumulator being configured to maintain a desired volume and pressure of the flow of working fluid in the integrated heat recovery and cooling cycle system. an integrated waste heat recovery and cooling cycle system comprising: a heat-to-power portion and an inlet cooling portion in fluid communication with the heat-to-power portion, wherein the heat-to-power portion comprises a two-stage pump/compressor, an intercooler disposed between a first stage and a second stage of the two-stage pump/compressor, one or more recuperators (70, 86) configured to receive a portion of a flow of working fluid, an exhaust heat recovery unit configured to receive the flow of working fluid and an expander disposed downstream of the exhaust heat recovery unit, and wherein the inlet cooling portion comprises a chiller expander, a chiller compressor coupled to the chiller expander, a motor coupled to the chiller compressor and an inlet air heat exchanger in fluid communication with, and intermediately positioned therebetween, the chiller expander and the chiller compressor, the inlet cooling portion configured to receive a portion of the flow of working fluid, a heat-to-power portion and an inlet cooling portion in fluid communication with the heat-to-power portion, wherein the heat-to-power portion comprises a two-stage pump/compressor, an intercooler disposed between a first stage and a second stage of the two-stage pump/compressor, one or more recuperators (70, 86) configured to receive a portion of a flow of working fluid, an exhaust heat recovery unit configured to receive the flow of working fluid and an expander disposed downstream of the exhaust heat recovery unit, and wherein the inlet cooling portion comprises a chiller expander, a chiller compressor coupled to the chiller expander, a motor coupled to the chiller compressor and an inlet air heat exchanger in fluid communication with, and intermediately positioned therebetween, the chiller expander and the chiller compressor, the inlet cooling portion configured to receive a portion of the flow of working fluid, a condenser in fluid communication with the heat-to-power portion and the inlet cooling portion; and a working fluid accumulator in fluid communication with the heat-to-power portion and the inlet cooling portion, the accumulator being connected to receive a portion of the working fluid output by the intercooler, the working fluid accumulator being configured to maintain a desired volume and pressure of the flow of working fluid in the integrated heat recovery and cooling cycle system.