INVITATION FOR TENDERS
UNIVERSITY OF MINES AND TECHNOLOGY, TARKWA (UMaT)
CONTRACT FOR THE SUPPLY, DELIVERY & INSTALLATION OF MECHANICAL ENGINEERING EQUIPMENT
Date: April 06, 2011
IFT No: UMaTR/TALIF-PROJECTS 2/2011
- The University of Mines and Technology, Tarkwa intends to apply part of Funds allocated by TALIF to make eligible payments under the Contract for the Supply, Delivery & Installation of Mechanical Engineering Equipment.
- Tendering will be governed by the eligibility rules and procedures under the Public Procurement Act (663) of 2003.
- The University of Mines and Technology now invites sealed tenders from eligible Tenderers for the Supply, Delivery and Installation of the Mechanical Engineering Equipment.
- Tendering will be conducted through the National Competitive Tendering procedures specified in the Public Procurement Act(663) of 2003 and in the Guidelines of the Public Procurement Agency of Ghana and is open to all tenderers from eligible source countries.
- Interested eligible Tenderers may obtain further information from the address given in paragraph 10 below from 8.00 a.m to 5.00 p.m local time from April 11, 2011.
- The Tender Document can be found for inspection from the website of the University of Mines and Technology: www.umat.edu.gh
- A complete set of tender documents in English may be purchased by interested Tenderers on the submission of a written application to the address given in paragraph 10 below upon a payment of a nonrefundable fee of 100 Ghana Cedis for each set.
- Tenders must be delivered to the address below at or before 10.00 a.m. local time on April 28, 2011. All tenders must be accompanied by a Tender Security of 2% of Tender price provided by a reputable financial institution. Late tenders will be rejected. Tenders will be opened in the presence of the Tenderers’ representatives, who choose to attend at the Conference Room of the University of Mines and Technology, Tarkwa at 10.00 a.m. on April 28, 2011.
- All Tenders are to be accompanied by the following documents;
a. Value Added Tax Registration Certificate
b. Valid Tax Clearance Certificate
c. Company Registration Certificate.
d. Audited Financial Statements for 2008 and 2009
Tenders not including any of the above shall be rejected.
- The Registrar
University of Mines and Technology
P. O. Box 237
TEL: 0362-20324; 0362-20280
Tender Data Sheet
The following specific data for the Goods to be procured shall complement, supplement, or amend the provisions in the Instructions to Tenderers. Whenever there is a conflict, the provisions herein shall prevail over those in Instructions to Tenderers.
[Instructions for completing the Tender Data Sheet are provided, as needed, in the notes in italics mentioned for the relevant ITT Clauses.]
|ITT.1.1||Name of Purchaser : University of Mines and Technology, Tarkwa|
|ITT. 2.1||The Source of Funds is Teaching And Learning Innovation Fund (TALIF)|
|ITT. 2.1||Name of Contract : Contract for the Supply, Delivery & Installation of Mechanical Engineering Equipment|
|ITT 3.1||Invitation for Tenders is open to all those eligible suppliers who are :|
|(a) registered within the Republic of Ghana,
(b) registered as per the Income Tax Act of Ghana, and
(c) VAT registered
|ITT 7.1||Purchaser’s Name: University of Mines and Technology Address : Telephone or telex : 0362-20324; 0362-20280
|ITT 8.1||Purchaser can modify Tender documents before the Deadline for submission of Tenders by issuing Addenda.|
|ITT 9.1||Language of the Tender : English|
|Tender Price and Currency|
ITT 12.1 (iii). The prices quoted shall include all incidental services, including installation, commissioning and training.
The prices shall be fixed
The prices shall be quoted in Ghana Cedis (GHC)
Preparation and Submission of Tenders
If the offered model is new, the
Amount of Tender Security : 2% of Tender Price from a reputable financial institution
Tender Validity Period: 90 days.
Format and signing of Tender
ITT 19.2 (a)
Address for Tender submission : THE REGISTRAR, THE UNIVERSITY OF MINES AND TECHNOLOGY, P.O. BOX 237, TARKWA.
ITT 19.2 (b)
IFT title and number : UMaTR/TALIF-PROJECTS 2/2011
Deadline for Tender submission :
Criteria for Tender evaluation shall be on the bases of :
Post Qualification Criteria
Notification of Award shall be sent to the successful Tenderer at any time
Tenderer shall deliver a Performance Security in the amount as specified in
Section VI. Technical Specification
(NINE (9) ITEMS IN ALL)
- Two-Shaft Gas Turbine Operated on LPG.
-The Two-shaft Gas Turbine Unit is offered as a fully instrumented two shaft machine with built in ignition power absorption system and data acquisition.
- It provides the means for carrying out an extensive programme of experiments in gas turbine technology.
-All instrumentation and controls are carried on the panel which displays the flow diagram with a clear indication of all measurements identified by symbols.
- Movable Self-contained complete teaching facility
- Data acquisition for all measured variables
-Comprehensive controls and instrumentation displayed in multi-colour diagram.
-Contains power turbine, calibrated electrical machine for torque and power measurement, ignition system, oil tank, circulating pump, cooler and filter, instrument panel with flow diagram, fitted inlet air flow gauge, fuel variable area flow meter, tachometers 92) multi point thermocouple instrument, sensitive pressure gauges, manometer, oil pressure gauge and fuel supply gauge.
-Complete with starting air compressor set and all controls.
Allows an extensive programme of experiments in Gas Turbine technology including:
1. Understanding functions and operations of a gas turbine.
2. Determination of shaft power and fuel consumption
3. Performance of a Two-shaft unit
4. Investigation of characteristics of individual components
- Gas generator compressor
- Combustion chamber characteristics
- Power turbine characteristics.
Data Acquisition System
a. A PC with lathes Pentium Processor
b. An electronic signal conditioning system
c. Stand alone data acquisition modules
d. Windows based software (Data logging, Signal Analysis, Process Control, Real-time display, Tabulated Results, Graph of Experimental results).
Computer-Aided Learning Software.
1. Interactive multimedia features
2. Graphical simulation
3. Experiment results samples
4. Full experiment manuals giving full description of the unit, summary of theory, experimental procedures and typical results.
- Computer Controlled Heat Transfer Service Unit.
- A bench top service unit can be used in conjunction with a range of small scale accessories for a wide range of demonstrations into the modes of heat transfer. The factors that affect heat transfer can be investigated and some of the practical problems associated with the transfer can be clearly demonstrated.
- It incorporates the facilities and safety features to allow the accessories to be remotely controlled from an external computer. With suitable software, this means that the equipment can be operated remotely, for instance over an intra-net or even over the internet.
- Provides a variable, stabilized 0 – 24V DC supply to the heater of the heat transfer accessory with a current capability of 9A.
- Provides a drive signal for a proportioning solenoid valve used for flow control
- Provides a control signal to a variable to a variable speed blower used for generating airflow.
- 10 temperature inputs and conditioning circuits for K-type thermocouples:
• 9 off, 0 – 133deg. Cels. Resolution <0.1deg. Cels.
• 1 off, 0 – 500deg. Cels, resolution <0.15deg. cels.
- Instrumentation inputs for heater voltage, heater current, air flow, water flow, radiation and light meter.
- Integral USB interface and educational software for all accessories.
- Outputs can be controlled manually from the front panel, or controlled by the software from a user supplied PC.
- Easy interfacing to 3rd party software e.g. Lab view
- Watchdog circuit for operator and equipment safety in case of computer or interface failure when being controlled remotely, e.g. over a network or the internet using customer written software.
- A comprehensive instruction manual describing how to carry out the laboratory teaching exercises in non-steady heat transfer and their analysis as well as assembly, installation and commissioning is included.
- Single phase mains electrical supply: 230V, 50Hz
- Thermo-Electric Heat Pump.
- Based on the Peltier device, the Thermo-Electric Heat Pump demonstrates how electrical power can be used to extract heat from a cool surface and transfer it to a hot surface. This effect is becoming widely used for point cooling (e.g. of semiconductor devices) and small scale volumetric cooling.
- Comprises a Peltier device, a heater, and a water-cooled heat exchanger.
- Heat transfer rates up to 68 Watts.
- Heater power, Peltier drive and cooling flow rate all fully electronically adjustable under computer control.
- Measurement of cooling water temperatures and flow to allow an overall energy balance.
- A comprehensive instruction manual is provided.
- Educational software is provided.
- Performance of a Peltier device as a cooler
- Heat transfer characteristics as a function as a function of temperature and drive current.
- Measurement of the co-efficient of performance
- Energy balance
- Demonstration of a Peltier device as an electrical generator.
- Computer Controlled Heat Exchanger Service Module.
- A lightweight bench top service unit, designed to accommodate a range of different small scale heat exchangers.
- Comprises hot water vessel, hot water recirculation pump, cold water control system, computer interface and all necessary instrumentation.
- The Hot water vessel is made from clear acrylic (for visibility) and includes a 2kW heater with thermostatic over-temperature cut-out and low water level detection.
- The Hot water pump is bi-directional ( to allow co-current counter-current investigations without re-configuring the hardware) and the flow rate is under computer control.
- The cold water system includes a manually adjustable pressure regulator and a flow control valve which us under computer control.
- Flow rates for both fluid streams in excess of 5L/min. are achievable, but this may be restricted by some designs of heat exchangers.
- Up to 10 temperature (K-type thermocouples) can be monitored using the service unit. Operating range, 0 – 75deg. Cels, resolution 0.1 deg. Cels.
- Two flow meters are included. Operating range 0.2 to 9L/min, resolution 0.1 L/min.
- All data is available to a (user supplied) Windows PC, via a USB interface. This computer is also used to control the flow rates, hot water temperature, and hot water direction.
- Full software for educational use is included.
• All the temperatures and flow rates are displayed on a diagrammatic representation of the equipment.
• A software button switches the equipment from standby mode to fully on
• Data from the sensors is logged into a spreadsheet format, under operator control.
• The data samples (measured and calculated) can be saved, or exported directly in Microsoft Excel format.
• Sophisticated graph plotting facilities are provided.
- Includes failsafe hardware facilities for remote operation, e.g over the internet, when used with the customer’s software.
- Ability for users to write and use their own software (e.g Labview
- Demonstration of indirect heating/cooling by transfer of heat from one fluid stream to another when separated by a solid wall.
- Energy balance determination ( heat balance) and calculation of efficiencies by measuring the flow rates and temperature changes in the hot and cold fluid streams.
- Using the Logarithmic Mean Temperature Difference in Heat transfer calculations.
- Definition and measurement of Overall Heat transfer Coefficient
- Demonstration of the transition from linear to turbulent flow.
- Demonstration of the differences between counter-current and co-current operation.
- Investigation of heat loss and reduction in heat transfer coefficient due to fouling of the heat transfer surfaces (suitable student project using user induced fouling)
- Tubular Heat Exchanger
- Consists of two concentric (coaxial) tubes carrying the hot and cold fluids.
- The inner tube is used for the hot fluid and the outer annuls for cold fluid.
- The inner tubes are constructed from stainless steel and the outer annulus from clear acrylic, providing visualization of the heat exchanger.
- Temperature measurement points:
• 6 off
• Hot fluid inlet
• Hot fluid mid-position
• Hot fluid outlet
• Cold fluid inlet
• Cold fluid mid-position
• Cold fluid outlet.
- Plate Heat Exchanger
- Has a single heating section configured for multi-pass operation with passes in series.
- It comprises seven individual plates, which are clamped together using two stainless steel threaded bars and nuts.
- Stainless steel plates each with a pressed chevron pattern and a forged grade silicon rubber sealing gasket mounted in a frame.
- Plate details:
• Plate overall dimensions: 75mm x 115mm
• Effective diameter: 3.0mm
• Plate thickness: 0.5mm
• Wetted perimeter: 153.0mm
• Projected heat transmission area: 0.008m2 per plate
- Clamping Mechanism: Dual screw threads with nuts
- Number of Plates: 7 ( 5 effective plates)
- Heat Exchanger configuration: Single heating stage
- Temperature measurement points: 4 off:
• Hot fluid inlet
• Hot fluid outlet
• Cold fluid inlet
• Cold fluid outlet.
- Photovoltaic Cells.
It is an apparatus that allows investigations and demonstrations into the operation and performance of photovoltaic cell array and battery charging system
- Shell & Tube Heat Exchanger
The shell & tube heat exchanger is commonly used in t he food and chemical process industries.
- Comprises an outer shell and 7 internal tubes. There are two transverse baffles inside the shell. It is designed to demonstrate liquid to liquid heat transfer in a 1-7 shell and tube.
- Four temperature sensors are supplied in tappings at fluids inlets and outlets.
- The heat exchanger is constructed from stainless steel tube and clear acrylic. It is mounted on a PVC base plate.
- Hot fluid in the inner tubes and cold fluid in outer shell to minimize heat loss from the exchanger without the need for additional insulation.
- Seven stainless steel tubes, 6.35mm OD
- The outer annulus, end caps and baffles constructed from clear acrylic tog allow visualization of the heat exchanger construction and minimize thermal losses.
- Nominal combined heat transfer area of 20,000mm2.
- Thermocouples are installed at the following 4 locations:
• Hot fluid
• Hot fluid outlet
• Cold fluid inlet
• Cold fluid.
- Comprehensive instruction manual
- Jacketed Vessel With Coil & Stirrer
- The vessel consists of a stainless steel wall with PVC base and clear acrylic top.
- A glass outer jacket allows the wall of the vessel to be surrounded with hot fluid for indirect heating from the outside. Alternatively, a stainless steel coil inside the vessel allows the cold fluid contained within the vessel to be indirectly heated from inside.
- The vessel incorporates a variable speed stirrer and baffle arrangement to allow thorough mixing of the vessel contents when required.
- An adjustable overflow allows the volume of liquid inside the vessel to be varied with maximum capacity of 2 litres and a minimum of 1 litre.
- The vessel can be operated batch wise by simply filling the overflow or with continuous feed of cold liquid to the base of the vessel.
- Thermocouples are installed at the following six locations:
• Vessel contents (cold fluid)
• Hot fluid inlet to jacket
• Hot fluid outlet from jacket
• Hot fluid inlet to coil
• Hot fluid inlet from coil
• Cold fluid inlet to vessel.