A near-surface geothermal plant uses the thermal energy stored below the earths surface. Using a two-well system, for example, thermal energy is extracted from the near-surface groundwater for heating purposes. The scope of geothermal energy is the study and use of the heat and the temperature distribution in the ground. It demonstrates the operation of such a two-well system.
Learning objectives/experiments:
Hydraulic properties of the ground
Determination of the usable heat capacity
Fundamentals of geothermal use
Fundamentals and energy balance of a simulated heat pump
Operating behaviour of a two-well system.
The Geothermal Flush Cart Learning System, which includes a mobile cart and a pump system, will cover flush cart set-up and operation to teach how to flush, purge, charge, and pressurize the geothermal system. It also covers introducing an anti-freeze additive to prevent pipes from freezing. Geothermal Flush Cart Learning System teaches how to purge debris and air from the geothermal loop and then charge it with a glycol/water solution. The Geothermal Flush Cart Learning System also includes world-class, highly interactive multimedia that will help learners to gain insight into the theoretical aspects of how the flush cart works and then allows them to follow along with step-by-step explanations of hands-on skills. Proper procedures for filling and pressurizing the system must be followed to avoid aerating the fluid being used to charge the system or this entrained air will lower system performance. Dirt and plastic pipe shavings can become trapped in geothermal systems during construction and must be purged to avoid damaging the system during operation.
Features:
Learn how to purge debris from a geothermal system
Expands geothermal learning capability.
The set-up also allows to take a closer look at the basic methods applied for determining the thermal conductivity of the surrounding soil of the geothermal probe. In near-surface geothermal energy generation the thermal energy stored under the Earths surface is used for heating purposes. The transparent experimental set-up provides an insight into the closed circuit of the heat transfer: it allows a clear view on the evaporation in the heat pipe, the condensation in the probe head and the reflux of the heat transfer medium on the inside wall of the heat pipe. It demonstrates the operation of a geothermal probe with heat pipe principle.
Learning objectives/experiments:
Determination of the amount of heat that can be dissipated in the heat pipe with variation of the thermal load
Determination of the sand's thermal conductivity by means of a thermal response test
Variation of the filling level of the heat transfer medium contained
Examination of the radial temperature profile in a sand sample and determination of the thermal conductivity
Fundamentals of geothermal energy
Operating behaviour of a geothermal probe with heat pipe principle
Fundamentals and energy balance of a heat pump.
The Geothermal Troubleshooting Learning System uses an exposed component layout so that learners can see each component's role in a geothermal system. Learners can easily observe, monitor, and test each component mounted and labeled on a vertical panel. Geothermal Troubleshooting Learning System is equipped with premier electronic fault insertion program for teaching troubleshooting skills. In addition to troubleshooting, the interactive multimedia curriculum and hands-on skills will teach startup, operation, shutdown, and maintenance of a geothermal system. Using, learners troubleshoot electrical, mechanical, and fluid-based faults to become effective real-world experts on residential and commercial geothermal systems. Also includes pressure and temperature gauges at key points to show the system's performance at a glance. Additionally, the system includes a custom designed, temperature-controlled ground simulator so the system can run continuously. Sight glasses installed in the Geothermal Troubleshooting Learning System allow the learner to see the refrigerant's changing state as it passes through the system.
Features:
Industry Standard System Components and Features
Ground Simulator Allows Continuous Training
Geothermal Troubleshooting with Desuperheater Learning System
Fault Pro: Electronic Fault Insertion Software.
Geothermal Turbine Trainer has multiple gauges for DC power (voltage and current) and several outputs for harnessing the electricity produced. Pressure relief and controls are mounted for safety. This system simulates an electric power generating plant, which uses a steam turbine.
The Geothermal Trainer shows students how thermal energy is used to generate electricity via a turbine, just as production wells use this source in geothermal power plants. Geothermal energy is a renewable and sustainable power source that comes from heat generated by the earth.
The amount of power generated is controlled by boiler pressure and/or the amount of fuel burned under the boiler. The student will burn pro-pane fuel or natural gas to generate steam, which is injected into a transparent turbine coupled to an electric generator, producing electricity.
Beam subjected to moving load or loaded down by single weights.
Gerber beam comprising two cantilever beams and one suspended beam.
Suspended beam mounted by articulated supports on cantilever beams.
Investigation of the lines of influence in a statically determinate Gerber beam under different loading.
Four movable supports with force gauge.
Experimental set-up in frame.
Storage system to house the components.
Clear turbidity standards are recognized by the primary stnadard for the calibration of turbidity meters online and in the laboratory for drinking water analysis.
Clear turbidity standards are traceable to NIST Primary Standards on account of their consistent particle size and photometric accuracy via UV-VIS spectroscopy.
Each lot is normalized to historical lots which were formulated to dilutions of 4000 NTU Formazin.
Consist of polymer microspheres suspended in a pure, aqueous medium
Uniform in particle size distribution to ensure consistent light scattering and precise enough to permit calibration down to and including 0 NTU
Primary turbidity standards for use in 90° nephelometers such as the 2100A, On-line instruments.
Ready to use — no mixing or dilution required
Nontoxic and won't settle out of suspension
Designed for 90° white light turbidimeters (EPA 180.1 design).
Guaranteed accuracy within 1%.
GFS Chemicals Linear Calibration SetsHighly accurate, stable and reproducible standards for calibrating turbidimeters and nephelometers.
Designed for 90° white light turbidimeters.
Ready to use — no mixing or dilution required
Nontoxic and won't settle out of suspension
Guaranteed accuracy within 1%
Consist of polymer microspheres suspended in a pure, aqueous medium
Uniform in particle size distribution to ensure consistent light scattering and precise enough to permit calibration down to and including 0 NTU.
Including one piece of silk and two organic glass rods.
Size of glass rod: φ12.5×300mm
Size of silk: ≥220*180mm.
A glass sided tilting flume with fabricated all stainless steel bed. Completely self-contained and comprising the working section, moulded inlet and discharge tanks, a series of sump tanks, a pump, an electronic flow meter, a jacking system and a control console. The channel section is fully glazed with large clear panels of toughened glass. A working cross-section of 300mm wide by 450mm deep and available in standard working lengths of 5m, 7.5m, 10m, & 15m. Longer lengths are available to special order in increments of 2.5m. The glass panels are sealed using a rubber section compressed by an aluminum alloy clamping strip. The flume bed is manufactured to high tolerances and designed with an integral web support frame to give the flume a high degree of rigidity and stability. This is coupled with careful design of the side support profiles to provide excellent visibility and allow flow visualization of the full working height of the flume. No under frame or support structure other than jacks is necessary. Rigid dowelled joints are used to connect the sections. The overall strength and rigidity of the design allows excellent stability figures to be achieved and eliminates the need to provide adjusting screws or to perform periodic setting up of the flume to maintain its specification.
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It is used for cleaning glassware and ceramic wares in middle schools and colleges, research institutions, medical and environmental protection units, industrial and mining enterprises. It uses single-axle flexible shaft, with the advantage of flexible cleaning, lower electricity consumption and convenience of use.
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-lab-1820396378.jpg "Global Positioning Systems (GPS)")
Global Positioning Systems (GPS)
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Material: PVC, glossy finish; Approximate thickness 0.19mm; able to survive rough treatment by the children. Inflating valve made of hard plastic, with two plastic loops for inserting rope/thread for hanging.
Topographical globe, inflatable (without the use of a pump): showing continents, oceans, rivers, mountains, deserts, forests, et cetera, but without emphasis on political boundaries (printed in dotted lines).
Medical examination gloves used for medical procedures to protect both patient and medical staff from cross-contamination. Examination gloves are non-sterile and strictly SINGLE USE.
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Medical examination gloves used for medical procedures to protect both patient and medical staff from cross-contamination. Examination gloves are non-sterile and strictly SINGLE USE.
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