Evaporator Tube

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Evaporator Tube

Product Details

Longda has a complete set of manufacturing and testing equipments ,which are the most
Advanced in the technical tube industry .Meanwhile ,we have established an effective
quality management system with strong execution.
We manufacture and control the products in accordance with ASTM (American Society
of Testing Materials) & ASME(American Society of Mechanical Engineers) standards.

1.Copper & Copper Alloys Tube
ASTM B75 ,ASTM B111,ASTM B359,ASME SB75,ASME SB111,ASME SB359
Chinese Standard :JB/T 10503, GB/T 19447 ,GB/T 17791,GB/T1527,GB/T 8890
DIN EN12451,DIN EN12449, EN12452, EN10204
2.Carbon Steel Tube ASTM A179 ,ASME SA179 ,ASTM A498
3.Stainless Steel Tube :ASTM A213 ,ASTM A268 ,ASTM A803
4.Titanium & Titanium Alloy Tube :ASTM B338, ASTMB861,ASME SB338 ,ASME SB861, GB/T 3624, GB/T 3625, EN17861
Fin Tube Material

Fin Tube Material	China GB	ISO	EN	UNS	JIS
Copper	TP2	Cu-DHP	CW024A	C12200	C1220
Copper	TP1	Cu-DLP	CW023A	C12000	C1201
Admiralty Brass	HSn70-1	CuZn28Sn1As	CW706R	C44300	C4430
Aluminum Brass	HAl77-2	CuZn20Al2As	CW702R	C68700	C6870
Copper Nickel 90/10	BFe10-1-1	CuNi10Fe1Mn	CW352H	C70600	C7060
Copper Nickel 90/30	BFe30-1-1	CuNi30Mn1Fe	CW354H	C71500	C7150
Carbon Steel Tube	10	-	E215	A179	STB340
Stainless Steel	06Cr19Ni10	-	X5CrNi18-10	304	SUS304
Stainless Steel	06Cr17Ni12Mo2	-	X5CrNiMo17-12-2	316	SUS316
Titanium Alloy	TA1	-	TI1	GR1	-
Titanium Alloy	TA2	-	TI2	GR2	-

Range of Available Dimensions

Product Category	Material				Plain End		Finned Dimensions
Pool Boiling Evaporator Tube & FallingFilm Evaporator Tube	C12200, C12000	C44300, C68700	C70600, C71500	A179	OD (mm)	End WT (mm)	Finished Fin OD (mm)	Norminal Wall under Fin (mm)	Fin Height (mm)	FPI
	☆	☆	☆		16	1.0	15.80	0.58	0.80	50
	☆	☆	☆		16	1.05	15.85	0.60	0.80	50
	☆	☆	☆		16	1.15	15.85	0.65	0.85	50
	☆	☆	☆		19	1.0	18.90	0.60	0.80	50
	☆	☆	☆		19	1.06	18.90	063	0.85	50
	☆	☆	☆		19	1.1	18.90	0.65	0.90	50
	☆	☆	☆		19	1.2	18.90	0.72	0.90	50
	☆	☆	☆		25.4	1.15	25.30	0.65	0.90	50
	☆	☆	☆	☆	16	1.2	15.85	0.75	0.80	50
	☆	☆	☆	☆	19	1.2	18.85	0.75	0.85	50
	☆	☆	☆	☆	16	1.2	15.85	0.78	0.80	50
	☆	☆	☆	☆	19	1.2	18.90	0.78	0.80	50

Product Category	Finned Dimensions (Continue)
Pool Boiling Evaporator Tube & FallingFilm Evaporator Tube	Nominal Outside Surface Area( m2/m)	Actual Outside Surface Area( m2/m)	Ridge Number	Norminal Ridge Height	Nominal Inside Surface Area(m2/m)	Actual Inside Surface Area( m2/m)
	0.050	0.23	20	0.30	0.044	0.048
	0.050	0.23	20	0.30	0.043	0.048
	0.050	0.235	20	0.35	0.040	0.048
	0.060	0.278	24	0.30	0.053	0.064
	0.060	0.278	24	0.30	0.053	0.070
	0.060	0.28	34	0.35	0.052	0.072
	0.060	0.28	38	0.35	0.052	0.075
	0.080	0.39	54	0.35	0.072	0.116
	0.050	0.23	20	0.30	0.040	0.0478
	0.060	0.275	34	0.30	0.052	0.072
	0.050	0.23	20	0.30	0.040	0.0478
	0.060	0.275	38	0.30	0.052	0.072

Application & Advantage

High Performance Evaporating Tube
High performance evaporating tubes are designed for flooded and falling film evaporators of chillers in air conditioning and refrigeration industry .Other clean service flooded evaporators duch as boiling of light hydrocarbons can also benefit from the enhanced performance of these technical tubes.

The fish scales like profiles are distributed uniformly on the enhanced surface of the tube while the circular channels are formed helically under the profiles.The special Porous structure has provided lots of nucleation points which are critical in flooded boiling .It has reduced the thickness of the liquid film between the bubbles and the tube wall to decrease the thermal resistance .
Meanwhile,it can accelerate the circulation of liquid and bubbles in the fin root channels and cavity pockets due to the thermo-siphon effect,which improves both internal and external convection.This circulation can also help to remove impurities to reduce fouling.In this special configuration ,refrigerant can boil more bubbles continuously
At less superheat .The shell transfer coefficient can be as high as 30 times that of a plain tube .

Furthermore ,the tube side heat transfer coefficient is again improved contributing
To increased surface area and turbulent fllow induced by helical ridges inside the tube.

Besides the applications in chiller industry,high performance evaporator fin tubes can also be found applied in any field where nucleate boiling needs to be driven by very small temperature difference in heat transfer such as the separation of light
Hydrocarbons,geothermal engineering,ocean thermal power generation ,waste heat recovery and in evaporation of the aqueous solution at low temperature etc.

In the falling film evaporator application ,the high performance evaporating tube
helps not only to reduce the refrigerant charge more than 1/3 ,but also improves the chiller performance to enable its stable operation.

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