A refrigeration circuit, comprising: a primary loop; a secondary loop connected to the primary loop; a first expansion valve arranged along the secondary loop and connected therethrough to the primary loop, a first evaporator connected in series with the first expansion valve and in parallel with a second expansion valve; the second expansion valve arranged along the secondary loop and connected therethrough to the primary loop, and a second evaporator connected in series with the second expansion valve and in parallel with the first expansion valve, wherein the second expansion valve is connected to the secondary loop and in parallel with the first expansion valve which is configured to control thermal communication between the refrigeration circuit and a first heat load independently from thermal communication between the refrigeration circuit and a second heat load, wherein the first evaporator provides the thermal communication between the refrigeration circuit and the first heat load according to a flow of refrigerant through the first expansion valve, and the second evaporator provides the thermal communication between the refrigeration circuit and the second heat load according to a flow of refrigerant through the second expansion valve; a condenser connected to the primary loop and the secondary loop to condense refrigerant communicated to the primary loop, the first expansion valve, and the second expansion valve; an ejector coupling the primary loop to the secondary loop, wherein the ejector has a primary inlet connected to the primary loop, a secondary inlet connected to the secondary loop, and an outlet connected to the primary loop and the secondary loop, wherein the ejector is connected to the primary loop, the first expansion valve, and the second expansion valve by the condenser; and a ram air duct or an overboard air conduit connected to the condenser, the condenser thermally coupling refrigerant traversing the primary loop with ram air or overboard air traversing the ram air conduit or the overboard air conduit. a primary loop; a secondary loop connected to the primary loop; a first expansion valve arranged along the secondary loop and connected therethrough to the primary loop, a first evaporator connected in series with the first expansion valve and in parallel with a second expansion valve; the second expansion valve arranged along the secondary loop and connected therethrough to the primary loop, and a second evaporator connected in series with the second expansion valve and in parallel with the first expansion valve, wherein the second expansion valve is connected to the secondary loop and in parallel with the first expansion valve which is configured to control thermal communication between the refrigeration circuit and a first heat load independently from thermal communication between the refrigeration circuit and a second heat load, wherein the first evaporator provides the thermal communication between the refrigeration circuit and the first heat load according to a flow of refrigerant through the first expansion valve, and the second evaporator provides the thermal communication between the refrigeration circuit and the second heat load according to a flow of refrigerant through the second expansion valve; a condenser connected to the primary loop and the secondary loop to condense refrigerant communicated to the primary loop, the first expansion valve, and the second expansion valve; an ejector coupling the primary loop to the secondary loop, wherein the ejector has a primary inlet connected to the primary loop, a secondary inlet connected to the secondary loop, and an outlet connected to the primary loop and the secondary loop, wherein the ejector is connected to the primary loop, the first expansion valve, and the second expansion valve by the condenser; and a ram air duct or an overboard air conduit connected to the condenser, the condenser thermally coupling refrigerant traversing the primary loop with ram air or overboard air traversing the ram air conduit or the overboard air conduit.