TH3 TELÍTETTSÉGI NYOMÁS

Cikkszám: TH3

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RENDELÉSI SPECIFIKÁCIÓK

• Asztali egység, amely tartalmaz vízforralót, csõhurkot szeleppel a nyomás csökkentéséhez. A vízforraló elején üvegablak van, így megfigyelhetõ a forrás, a nyomást folyamatosan mérjük Bourdon csöves nyomásmérõvel a biztonságos mûködés érdekében.
• A csõhurok mellett kaloriméter helyezkedik el, ezzel meghatározható a telített gõz állapota a gõz hõmérsékletének mérésével, miközben  a nyomását atmoszférikusra csökkentjük.
• Az elektromos konzol tartalmazza a szükséges elektronikát és az RCD-t. A választó kapcsolós digitális kijelzõ mutatja a mért értékeket. Opcionális interfész egységen keresztül a számítógéphez csatlakoztatható, szoftverrel.
• A vízforralót egy pár 500W-os fûtõelemmel melegítjük, amely szabályozható és túlmelegedés védelemmel van ellátva.
• Részletes kézikönyv kísérleti feladatokkal.

OKTATÁSI LEHETÕSÉGEK

• A telítési görbék tanulmányozása, kétfázisú elegy jellemzõi.
• A gõz táblázatok használata.
• Gõz nedvességtartalmának meghatározása kaloriméterrel.

A termék részletes technikai, mûszaki adatait lásd lent, illetve a letölthetõ pdf. tartalmazza. Amennyiben részletesebb magyar nyelvû leírásra van szüksége, kérjük jelezze.

KEY FEATURES

> Measurement of the relationship between temperature and pressure of the saturated vapour in the loop

> Convenient control of heat input to the boiler using variable power control

> Sight glass in the boiler allows observation of the boiling patterns in the water

> Safe operation with pressure relief valve and permanent indication of system pressure

> Pressure and temperatures measured can be logged using a PC (optional teaching software available)

DESCRIPTION

A bench top unit designed to introduce students to the characteristics of saturated water vapour.

The apparatus consists of a rectangular pipe loop incorporating a cylindrical boiler in one vertical limb. Pure water in the boiler is heated to its boiling point using a pair of cartridge heaters with variable power control. A sight glass on the front of the boiler allows the internal processes to be observed, namely boiling patterns at the surface of the water, and also allows the water level in the boiler to be monitored. Saturated steam leaving the top of the boiler passes around the pipe loop before condensing and returning to the base of the boiler for re-heating. The operating range of the boiler and loop is 0 to 7 bar gauge. The top limb of the pipe loop incorporates a PRT temperature sensor and an electronic pressure sensor to measure the properties of the saturated steam. A filling point on the top limb allows the loop to be filled with pure water and allows all air to be vented safely before sealing the loop for pressurised measurements. A vapour offtake, with isolating valve, allows steam from within the loop to be passed through a throttling calorimeter, the purpose of which is to demonstrate how the dryness fraction of the saturated steam in the loop can be determined. The steam expands to atmospheric pressure as it is throttled and a second PRT temperature sensor measures the temperature of the steam following expansion.

The apparatus is designed for safe operation with a pressure relief valve set to operate if the pressure rises above the working pressure and a Bourdon gauge that remains operational when power is disconnected from the electrical console.

All power supplies, signal conditioning, circuitry etc are contained in an electrical console with appropriate current protection devices and an RCD for operator protection. Readings from the sensors are displayed on a common digital meter with selector switch and all corresponding signals are routed to an I/O port for connection to a PC using an optional parallel interface/ educational software package (TH-IFD with TH3-303).

OPTIONAL ACCESSORIES

TH-304IFD: Educational software for TH1-TH5 on a single CD-ROM complete with Data-logger

RECOMMENDED INSTRUMENTS

Accurate barometer: (to determine the absolute pressure)

REQUIREMENTS

Single phase mains electrical supply:

TH3-A: 220/240V/1ph/50Hz @ 10A

TH3-B: 120V/1ph/60Hz @ 15A

TH3-G: 220V/1ph/60Hz @ 10A

Initial fill with pure water (3 litres) and replenish as consumed

SHIPPING SPECIFICATION

Volume: 0.26m3

Gross Weight: 20kg

OVERALL DIMENSIONS

Saturation Loop/Throttling Calorimeter

Height: 0.580m

Width: 0.670m

Depth: 0.290m

Electrical Console

Height: 0.215m

Width: 0.225m

Depth: 0.290m