54results about How to "Improve heat exchange performance" patented technology

A double pipe for a heat exchanger includes an inner pipe having a plurality of spiral projections extending radially outward from an outer peripheral surface of the inner pipe. An outer pipe is disposed around the inner pipe. At least an inner peripheral surface of the outer pipe is at least substantially smooth and has an at least substantially circular cross section. The inner peripheral surface of the outer pipe contacts all of the projections of the inner pipe so as to define a plurality of peripherally-separated, outer flow paths between the inner pipe and the outer pipe. Fluid flowing within an inner flow path defined by the inner pipe exchanges heat with fluid flowing through the outer flow paths. Furthermore, an inscribed circle of the inner pipe has a first diameter (d1), an inscribed circle of the outer pipe has a second diameter (d2), and 0.6<d1 / d2.

Disclosed are a method, a system and use for heat exchange in super-critical or near-critical water gasification process of biomass. The method comprises the steps of: heating a biomass in a first heat exchanger (6) by thermal energy of a heat transfer medium, reacting the biomass in said super-critical or near-critical water gasification process and producing reaction products, cooling the reaction products of the biomass in a second heat exchanger (12) by absorbing the thermal energy of the reaction products to said heat transfer medium, and circulating said heat transfer medium between the first heat exchanger (6) and the second heat exchanger (12), wherein molten salt is used as the heat transfer medium.

The invention relates to an ice maker, in particular to a sea / fresh water dual-purpose continuous ice-discharging ice maker. It includes: compressor, ice making cylinder, ice outlet pipe, thermal expansion valve, dry filter, gas-liquid separator, condenser. The machine and the ice making cylinder are driven by the motor respectively, the compressor is connected with the ice making cylinder through the condenser, gas-liquid separator, dry filter, and thermal expansion valve, and the ice making cylinder and the compressor form a circuit through the gas-liquid separator, The ice outlet pipe is arranged on one side of the ice making cylinder. The invention has the advantages of simple and compact structure, low heat resistance, superior heat exchange performance, high ice making efficiency and safe production process.

It is an object of this invention to obtain a heat conduction pipe superior in corrosion resistance as well as heat exchange efficiency between fluid flowing respectively through an inside and an outside for great heat radiation property and endothermic characteristics. It is also object of this invention to form the heat conduction pipe superior in the corrosion resistance as well as the heat radiation property and endothermic characteristics at inexpensive price. To achieve the above, at least single resin coating layer is formed on an outer circumferential surface of a metal pipe, a metal fin member is spirally wound on an outer circumferential surface of the resin coating layer with a side end surface the metal fin member in contact. The winding contact portion is made to encroach a surface of the resin coating layer to form the heat conduction pipe.

The invention provides a heat exchanger, which is provided with a fin member, so that the thermal conductivity between the fin member and the main body of the serpentine tube is improved, and a heat exchanger with excellent heat exchange performance can be obtained cheaply through simple manufacturing technology and process . In addition, a compact heat exchanger can be formed, and it can be installed in a narrow space, etc., and a product with a high degree of freedom of arrangement can be obtained. The fin member (5) has a plurality of fins (4) arranged in parallel, and a plurality of engagement grooves (8) are provided on opposite end surfaces (6) (7) of the fin member (5). Separate the opposing intervals (16), arrange the plurality of straight pipe parts (2) in parallel in the engaging groove (8) for disposing the fin member (5), and use the bent part (3 ) connect the plurality of straight pipe parts (2), separate the insertion gap (17) of the fin member (5), arrange a pair of serpentine parts (11), (12) opposite to each other, pass through the connecting pipe (13), One serpentine part (11) and the other serpentine part (12) are connected to form a serpentine pipe main body (1). In the insertion gap (17) between one meandering part (11) and the other meandering part (12) of the meandering pipe main body (1), a fin member (5) is inserted and arranged, and the fin member (5) In the engagement groove (8) of one end surface (6) of ), the straight pipe portion (2) of one serpentine part (11) is arranged, and in the engagement groove (8) of the other end surface (7), A straight pipe part (2) is arranged to fix the other side of the meandering part (12).