The sleeve heat exchanger is a special product designed and manufactured for small and medium-sized cold water (heat pump) units. It is widely used in refrigeration equipment of water ring heat pump unit, water source cold water (heat pump) unit, air source cold water (heat pump) unit and ground source cold water (heat pump) unit. The structure of the tube-type heat exchanger is fully optimized and integrated, which makes the structure more reasonable and the performance more stable. It is bent together with the inner copper tube bundle to form a laminated spiral casing body, and a steel fixing bracket is welded and solidified with the casing body. The two ends of the casing lead out the refrigerant and cooling water connection routines.Plate heat exchangers are highly efficient heat exchange equipment. In practical applications, one is an umbrella plate heat exchanger manufactured by a spinning method, and the other is a flat plate heat exchanger manufactured by a stamping method. Its structural characteristics are as follows:
(1) The plate heat exchanger has a small volume and a small footprint. The plate heat exchanger covers an area of about 30% of the tube-and-tube heat exchanger with the same heat exchange capacity, and it is more superior than the sprinkler-type tube cooler.
(2) The plate heat exchanger is easy to disassemble, clean and maintain. The compression nut can be loosened to clean and replace the rubber pad or plate. Due to the intense turbulence of the medium in the plate heat exchanger, the critical Reynolds number of the turbulence is about 10 times lower than that of a general tube-and-tube heat exchanger, so it is not easy to scale.
(3) The plate heat exchanger has high heat transfer efficiency. The plate heat exchanger can make the two heat exchange fluids stimulate turbulence at a lower flow rate, thereby enhancing heat transfer. The heat transfer coefficient value K can reach 16720J / (m2h ° C) (water to water). It’s 2 ~ 4 times higher than the tube heat exchanger.
(4) Low metal consumption of plate heat exchanger. The plate heat exchanger is mainly composed of a stainless steel or titanium alloy pressed heat transfer sheet, a sealing rubber pad, a clamping bolt and a compact plate complete machine frame. The plate heat exchanger consumes about 8kg of metal per square meter of plate, while the tube heat exchanger of the same parameter needs about 20kg.