High-efficiency extra-large cooling capacity series chiller in energy station

Abstract

A high-efficiency extra-large cooling capacity series water-cooled chiller in an energy station, comprising at least two evaporators, a condenser, a chilled water main pipe and a cooling water main pipe, all the evaporators form an evaporator series set in a series connection form, both ends of the evaporator series set are connected to the chilled water main pipe, and each evaporator is provided with a refrigerant channel for connecting the condenser. According to the present invention, the evaporators are set in series combination. When the load is very low, one compressor operates at a high load or at full load, that is, the compressor continuously operates in a high efficiency zone, which avoids multiple compressors operating in an inefficient zone, and high total power.

What is claimed is: 
     
         1 . A high-efficiency extra-large cooling capacity series chiller in an energy station, comprising at least two evaporators ( 1 ), a condenser ( 3 ), a chilled water main pipe ( 21 ) and a cooling water main pipe ( 31 ), wherein all the evaporators ( 1 ) form an evaporator series set in a series connection form, both ends of the evaporator series set are connected to the chilled water main pipe ( 21 ), and each evaporator ( 1 ) is provided with a refrigerant channel ( 5 ) for connecting the condenser ( 3 ), the refrigerant channel ( 5 ) is divided into two parts comprising a refrigerant supply channel ( 51 ) and a refrigerant return channel ( 52 ), the refrigerant supply channel ( 51 ) and the refrigerant return channel ( 52 ) are respectively provided with a relief valve ( 4 ) and the compressor ( 2 ), the evaporator ( 1 ) is internally provided with a temperature sensor ( 10 ) for collecting a temperature of chilled water leaving the evaporator ( 1 ), and the temperature sensor ( 10 ) is connected to the corresponding compressor ( 2 ). 
     
     
         2 . The high-efficiency extra-large cooling capacity series water-cooled chiller in an energy station according to  claim 1 , wherein the evaporator series set is embedded in the chilled water main pipe ( 21 ). 
     
     
         3 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 1 , wherein an evaporating shell pass ( 11 ) of the evaporator ( 1 ) serves as a refrigerant channel, and the evaporator ( 1 ) is internally provided with a plurality of evaporating tube passes ( 12 ) as chilled water channels. 
     
     
         4 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 1 , wherein the condenser ( 3 ) is embedded in the cooling water main pipe ( 31 ), a condensing shell pass ( 32 ) of the condenser ( 3 ) serves as a refrigerant channel, and the condenser ( 3 ) is internally provided with a plurality of condensing tube passes ( 33 ) as cooling water channels. 
     
     
         5 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 1 , wherein a total length of the refrigerant channel ( 5 ) is no more than 200 meters. 
     
     
         6 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 1 , wherein the condenser ( 3 ) is placed on the ground and the evaporator ( 1 ) is suspended above the condenser ( 3 ). 
     
     
         7 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 1 , wherein the evaporator ( 1 ) and the chilled water main pipe ( 21 ) are connected by a reduction nipple. 
     
     
         8 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 3 , wherein a total cross-sectional area of the evaporating tube passes ( 12 ) is no less than a cross-sectional area of the chilled water main pipe ( 21 ). 
     
     
         9 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 4 , wherein a total cross-sectional area of the condensing tube passes ( 33 ) is no less than a cross-sectional area of the cooling water main pipe ( 31 ). 
     
     
         10 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 2 , wherein the condenser ( 3 ) is placed on the ground and the evaporator ( 1 ) is suspended above the condenser ( 3 ). 
     
     
         11 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 3 , wherein the condenser ( 3 ) is placed on the ground and the evaporator ( 1 ) is suspended above the condenser ( 3 ). 
     
     
         12 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 4 , wherein the condenser ( 3 ) is placed on the ground and the evaporator ( 1 ) is suspended above the condenser ( 3 ). 
     
     
         13 . The high-efficiency extra-large cooling capacity series chiller in an energy station according to  claim 5 , wherein the condenser ( 3 ) is placed on the ground and the evaporator ( 1 ) is suspended above the condenser ( 3 ).