Refrigerant vapor compression system

A refrigerant vapor compression system comprising:

• a compression device having at least a first compression stage and a second compression stage arranged in series refrigerant flow relationship;
• a first refrigerant heat rejection heat exchanger disposed downstream with respect to refrigerant flow of the second compression stage for passing refrigerant in heat exchange relationship with a first secondary fluid;
• a second refrigerant heat rejection heat exchanger disposed upstream with respect to refrigerant flow of the first refrigerant heat rejection heat exchanger for passing the refrigerant in heat exchange relationship with a second secondary fluid, and wherein the second refrigerant heat rejection heat exchanger is directly downstream of the second compression stage and directly upstream of the first refrigerant heat rejection heat exchanger;
• a first refrigerant intercooler disposed intermediate the first compression stage and the second compression stage for passing the refrigerant passing from the first compression stage to the second compression stage in heat exchange relationship with the first secondary fluid;
• a second refrigerant intercooler disposed intermediate the first compression stage and the second compression stage and directly upstream with respect to refrigerant flow of the first refrigerant intercooler for passing the refrigerant passing from the first compression stage to the second compression stage in heat exchange relationship with the second secondary fluid, and wherein the second refrigerant intercooler is directly downstream of the first compression stage;
• and
• an economizer circuit including a vapor line in fluid communication with a suction inlet into to the second compression stage, and wherein an outlet from the first refrigerant heat rejection heat exchanger feeds directly into the economizer circuit.

A refrigerant vapor compression system comprising:

• a compression device having at least a first compression stage and a second compression stage arranged in series refrigerant flow relationship;
• a first refrigerant heat rejection heat exchanger disposed downstream with respect to refrigerant flow of the second compression stage for passing refrigerant in heat exchange relationship with a first secondary fluid;
• a second refrigerant heat rejection heat exchanger disposed upstream with respect to refrigerant flow of the first refrigerant heat rejection heat exchanger for passing the refrigerant in heat exchange relationship with a second secondary fluid, and wherein the second refrigerant heat rejection heat exchanger is directly downstream of the second compression stage and directly upstream of the first refrigerant heat rejection heat exchanger;
• a first refrigerant intercooler disposed intermediate the first compression stage and the second compression stage for passing the refrigerant passing from the first compression stage to the second compression stage in heat exchange relationship with the first secondary fluid, wherein the first refrigerant intercooler is directly downstream of the first compression stage and directly upstream of the second compression stage;
• and
• an economizer circuit including a vapor line in fluid communication with a suction inlet into to the second compression stage, and wherein an outlet from the first refrigerant heat rejection heat exchanger feeds directly into the economizer circuit.

A refrigerant vapor compression system comprising:

• a compression device having at least a first compression stage and a second compression stage arranged in series refrigerant flow relationship;
• a first refrigerant heat rejection heat exchanger disposed downstream with respect to refrigerant flow of the second compression stage for passing refrigerant in heat exchange relationship with a first secondary fluid;
• a second refrigerant heat rejection heat exchanger disposed upstream with respect to refrigerant flow of the first refrigerant heat rejection heat exchanger for passing the refrigerant in heat exchange relationship with a second secondary fluid, and wherein the second refrigerant heat rejection heat exchanger is directly downstream of the second compression stage and directly upstream of the first refrigerant heat rejection heat exchanger;
• a first refrigerant intercooler disposed intermediate the first compression stage and the second compression stage for passing the refrigerant passing from the first compression stage to the second compression stage in heat exchange relationship with the first secondary fluid;
• a second refrigerant intercooler disposed upstream with respect to refrigerant flow of the first refrigerant intercooler for passing the refrigerant passing from the first compression stage to the second compression stage in heat exchange relationship with the second secondary fluid, and wherein the second refrigerant intercooler has a fluid pass and a refrigerant pass arranged in a heat transfer relationship, and wherein an outlet from the first compression stage is in direct flow communication with an inlet to the refrigerant pass, and wherein an outlet from the refrigerant pass is in direct flow communication with an inlet to the first refrigerant intercooler;
• and
• an economizer circuit including a vapor line in fluid communication with a suction inlet into to the second compression stage, and wherein an outlet from the first refrigerant heat rejection heat exchanger feeds directly into the economizer circuit.