A heat exchange device suitable for a low pressure refrigerant, comprising: - a condenser configured to receive a refrigerant, wherein the condenser comprises a refrigerant outlet; - an evaporator comprising a refrigerant inlet and an evaporation tube bundle configured to place the refrigerant in a heat exchange relationship with a fluid flowing through the evaporation tube bundle; - a throttling device disposed between the evaporator and the condenser, wherein the throttling device is configured to receive a first portion of the refrigerant from the condenser, and wherein the throttling device is configured to expand the first portion of the refrigerant before directing the expanded first portion of the refrigerant to the evaporator; and - an ejector disposed between the evaporator and the condenser, wherein the ejector comprises a high pressure conduit, a low pressure conduit, and an outlet conduit, wherein the ejector is configured to receive a second portion of the refrigerant from the condenser via the high pressure conduit, the ejector is configured to receive liquid refrigerant from the evaporator via the low pressure conduit, and the ejector is configured to mix the second portion of the refrigerant with the liquid refrigerant to form a mixed refrigerant and direct the mixed refrigerant to the evaporator via the outlet conduit of the ejector, and wherein the evaporator is configured to receive a mixture of the mixed refrigerant from the ejector and the expanded first portion of the refrigerant from the throttling device, wherein the throttling device and the ejector are arranged in a parallel arrangement with respect to a flow of the refrigerant from the condenser to the evaporator, and wherein: - the high pressure conduit of the ejector is in fluid communication with a refrigerant outlet of the condenser, - the low pressure conduit of the ejector is in fluid communication with a bottom portion of the evaporator, - the outlet conduit of the ejector is in fluid communication with a refrigerant inlet of the evaporator, and - the throttling device is disposed between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator. - a condenser configured to receive a refrigerant, wherein the condenser comprises a refrigerant outlet; - an evaporator comprising a refrigerant inlet and an evaporation tube bundle configured to place the refrigerant in a heat exchange relationship with a fluid flowing through the evaporation tube bundle; - a throttling device disposed between the evaporator and the condenser, wherein the throttling device is configured to receive a first portion of the refrigerant from the condenser, and wherein the throttling device is configured to expand the first portion of the refrigerant before directing the expanded first portion of the refrigerant to the evaporator; and - an ejector disposed between the evaporator and the condenser, wherein the ejector comprises a high pressure conduit, a low pressure conduit, and an outlet conduit, wherein the throttling device and the ejector are arranged in a parallel arrangement with respect to a flow of the refrigerant from the condenser to the evaporator, and wherein: - the high pressure conduit of the ejector is in fluid communication with a refrigerant outlet of the condenser, - the low pressure conduit of the ejector is in fluid communication with a bottom portion of the evaporator, - the outlet conduit of the ejector is in fluid communication with a refrigerant inlet of the evaporator, and - the throttling device is disposed between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator. - the high pressure conduit of the ejector is in fluid communication with a refrigerant outlet of the condenser, - the low pressure conduit of the ejector is in fluid communication with a bottom portion of the evaporator, - the outlet conduit of the ejector is in fluid communication with a refrigerant inlet of the evaporator, and - the throttling device is disposed between the refrigerant outlet of the condenser and the refrigerant inlet of the evaporator.