A system for dispensing a fuel, comprising: a storage tank configured to store a liquefied fuel therein, the liquefied fuel comprising phases of liquid and vapor; a pressure sensor coupled to the storage tank and configured to measure a vapor pressure inside the storage tank ; a dispenser configured to receive the liquefied fuel from the storage tank ; a heat exchanger thermally coupled with the dispenser and configured to convert the liquefied fuel in the dispenser to a gaseous fuel, the dispenser configured to dispense the gaseous fuel to a receiving fuel tank ; a temperature sensor coupled to the dispenser and configured to measure temperature of the dispenser ; and a vapor supply unit fluidly coupled with the storage tank and configured to provide the vapor of the liquefied fuel from the storage tank into the dispenser or in thermal contact with at least one portion of the dispenser ; wherein the vapor supply unit is configured to supply the vapor of the liquefied fuel from the storage tank into the dispenser or the vapor supply unit is configured to supply the vapor of the liquefied fuel from the storage tank into a circulation line of the heat exchanger ; wherein the vapor supply unit includes no pump or compressor in a path of a vapor from the storage tank to the dispenser ; and wherein the vapor supply unit is configured to adjust the flow rate of the vapor of the liquefied fuel so as to maintain the vapor pressure inside the storage tank and the temperature of the dispenser within predetermined ranges; wherein the system further comprises an electronic controller electronically connected with the pressure sensor and the temperature sensor, and configured to adjust the flow rate of the vapor of the liquefied fuel based on the vapor pressure inside the storage tank and the temperature of the dispenser within predetermined ranges. a storage tank configured to store a liquefied fuel therein, the liquefied fuel comprising phases of liquid and vapor; a pressure sensor coupled to the storage tank and configured to measure a vapor pressure inside the storage tank ; a dispenser configured to receive the liquefied fuel from the storage tank ; a heat exchanger thermally coupled with the dispenser and configured to convert the liquefied fuel in the dispenser to a gaseous fuel, the dispenser configured to dispense the gaseous fuel to a receiving fuel tank ; a temperature sensor coupled to the dispenser and configured to measure temperature of the dispenser ; and a vapor supply unit fluidly coupled with the storage tank and configured to provide the vapor of the liquefied fuel from the storage tank into the dispenser or in thermal contact with at least one portion of the dispenser ; wherein the vapor supply unit is configured to supply the vapor of the liquefied fuel from the storage tank into the dispenser or the vapor supply unit is configured to supply the vapor of the liquefied fuel from the storage tank into a circulation line of the heat exchanger ; wherein the vapor supply unit includes no pump or compressor in a path of a vapor from the storage tank to the dispenser ; and wherein the vapor supply unit is configured to adjust the flow rate of the vapor of the liquefied fuel so as to maintain the vapor pressure inside the storage tank and the temperature of the dispenser within predetermined ranges; wherein the system further comprises an electronic controller electronically connected with the pressure sensor and the temperature sensor, and configured to adjust the flow rate of the vapor of the liquefied fuel based on the vapor pressure inside the storage tank and the temperature of the dispenser within predetermined ranges. <EOS>