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DESIGN AND PRODUCTION OF A NON-METAL WATER TO WATER HEAT EXCHANGER Question
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Posted by: wjker

03/15/2005, 13:33:09

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Dear Sir;
I am a mechanical engineer student(8.semester undergraduate) in Izmir Instute Of technology TURKEY.we were given a final project by our instructor.I would be glad if you

could help me in the design process of this project.You would also realise that the difference of this project compared to others is the material.The material would be "non

metal".I am looking forward for your answer especially in the material selection process.(The project description is in the below):
402 MECHANICAL DESIGN


DESIGN AND PRODUCTION OF
A NON-METAL WATER TO WATER HEAT EXCHANGER

The aim of the project is to design and produce a heat exchanger in which both working fluids are water. The water inlet temperatures, flow rates and maximum dimension of the heat exchanger will be the same for the all groups. Table -1- shows the heat exchanger working conditions. The heat exchangers will be tested and evaluated under the conditions given in this table. The input and output for the heat exchanger will be the water mentioned in the Table -1-, thus there will be no additional heat or work inputs. Leakage between two fluids is not permitted and leakage tests will be performed before the final evaluation. Fouling factors should be considered in the calculation. All parts of the heat exchanger must be made of non-metal materials. Components can be provided from market, however assembling (welding, screwing, drilling etc) will be done in IZTECH workshops. Tests for devices may be performed for several times, thus the heat exchangers should be able to work under the given conditions for long time. Devices should be available and work on competition day and no excuse will be accepted.


PROGRESS REPORTS
The progress reports should be submitted at the each step of project. The steps of project will be announced later. All activities during a step of project (searches, calculations, drawings, tests etc) should be presented in the related report.


GRADUATION REPORT
A final report containing the following sections should be prepared:

- Abstract
- General information about water to water heat exchangers
-Detailed information about the designed heat exchanger including technical drawings
- Thermal and mechanical design information
- Material selection
-Method of production including information about required machines for manufacturing
- Cost analysis
- Other necessary information


COMPETITION CRETERIA FOR DEVICE
Following criteria will be employed for evaluation of the device:

- Water outlet temperatures and heat exchanger thermal efficiency
- Water pressure drop for both sides
- Dimensions
- Originality and creativity
- Ease of cleaning and maintenance
- Cost
- Progress and final reports
- Esthetics
- Durability

TABLE-1
HEAT EXCHANGER WORKING CONDITIONS

Hot water Cold water
Inlet temperature C 60 15 ~ 20
Mass flow rate(lt/min) 5 5
Inlet and outlet pipe connections (inch)
* Maximum dimension for heat exchanger, excluding connection pipes, is 50x20x20 (cm3 )







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Re: DESIGN AND PRODUCTION OF A NON-METAL WATER TO WATER HEAT EXCHANGER
Re: DESIGN AND PRODUCTION OF A NON-METAL WATER TO WATER HEAT EXCHANGER -- wjker Post Reply Top of thread Forum
Posted by: devitg

03/27/2005, 20:27:23

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Just to give a start kick.

As there is not a pressure to be consider , and despite a valuable data is miss , maybe by you , which is the DELTA temp
You say hot is 60 C and and cool is 15 20 ?
I will use a 200 mm diameter 500 mm lengt PVC tube , like the used at sewage , with a inside coil of PE tube as the 1/2" is a limitation a 1/2" hose or tube , could not be coil inside the 200 mm tube, I would use a bundle of small diameter tubes
It is call TUBE in Shell heat echanger.
I used it , made from steel the shell , and cooper tubes , on refrigeration condensers and evaporator.
Feel free to ask any further.








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