TH5 A TÖKÉLETES GÁZ EXPANZIÓS FOLYAMATAI

Cikkszám: TH5

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Termékleírás:

RENDELÉSI SPECIFIKÁCIÓK

• Az ideális gázokkal kapcsolatos kísérletek során bevezethetjük a diákokat az alap termodinamikai folyamatokba
• Az eszköz tartalmaz két padlón álló összekapcsolt merev tartályt, az egyik nyomás alatt a másik vákuumban mûködik.
• Megfelelõ szelepek és megcsapolások helyezkednek el a tartályokon. Egy elektromos levegõpumpa segítségével idézhetõ elõ túlnyomás és vákuum. Mindkét tartály tartalmaz gyors válaszidejû hõmérséklet érzékelõt a levegõ hõmérsékletének nyomon követéséhez.
• Az elektromos konzol tartalmazza a szükséges elektronikát, az áramkörök védelméhez szükséges eszközöket és RCD-t. A választó kapcsolós digitális kijelzõ mutatja a mért hõmérséklet és nyomás értékeket.
• Opcionális interfész egységen keresztül a számítógéphez csatlakoztatható, szoftverrel.
• Részletes kézikönyv kísérleti feladatokkal.

OKTATÁSI LEHETÕSÉGEK

• A Termodinamika I. törvényét alkalmazó folyamatok nyomásváltozásainak vizsgálata.
• A Termodinamika II. törvénye
• A nyomás, a térfogat és a hõmérséklet kapcsolatának vizsgálata.
• Lassú és gyors változásokra adott különbözõ válaszok, valamint a levegõ nyomásának és hõmérsékletének kapcsolata.

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

KEY FEATURES

> interconnected vessels operating under pressure and under vacuum are supplied complete with electric air pump and appropriate instrumentation ready for use.

> this modern version of a classic experiment (attributed to Clément and Désormes)allows pressure and temperature changes to be monitored continuously using a PC. (optional teaching software available)

> the vessels can be operated singly or in combination allowing processes whereby air flows from a pressurised vessel to atmosphere, from atmosphere to an evacuated vessel or from a pressurised vessel to an evacuated vessel.

The apparatus consists of two floor- standing interconnected rigid vessels,one equipped for operation under pressure and the second under vacuum.

An electrically operate air pump mounted on top of the vessels,together with valves and tappings allows the appropriate vessel to be pressurised or evacuated as required to suit the teaching exercise.The vessels can be used independently or together to allow different thermodynamic processes to be evaluated.A pressure sensor connected to each vessel and a temperature sensor inside each vessel allow the changes in the properties of the air contained within the vessels to be monitored continuously.

Both vessels are constructed from clear rigid plastic which affords light insulation between the air inside the vessel and the surroundings to reduce heating/cooling but allows each vessel and its contents to return to ambient temperature reasonably quickly.

The capacity of the pressurised vessel is approximately 23 litres.The capacity of the evacuated vessel is approximately 11 litres.

Each vessel incorporates the following features:

> connection to the air pump via an isolating valve to allow the vessel to be pressurised/evacuated

> connection to a piezo-resistive sensor to measure the pressure/ vacuum inside the vessel (range of both sensors ±34.5kN/m2

> connection to a large bore pipe and valve to allow depressurisation/ pressurisation of the vessel to/from the atmosphere (the valve is rapidly opened and closed to provide a small step change in pressure)

> interconnection between the two vessels via a large bore pipe and valve (fast change)and small bore pipe and needle valve (gradual change).

> fast response thermistor to monitor air temperature inside the vessel

> relief valve to prevent over-pressurisation

All power supplies,signal conditioning circuitry etc are contained in a simple electrical console with appropriate current protection devices and an RCD for operator protection.The console is designed to stand on a bench top above the pressure and vacuum vessels and incorporates electrical connections for the air pump and sensors.

Readings from the pressure sensors and thermistors are displayed on a common digital meter with selector switch on the front of the console. All signals are simultaneously connected to an I/O port for connection to a PC with USB port using an optional interface device and educational software package (IFD5 with TH5-304)or a user supplied chart recorder as required.

As the teaching exercises require the transient pressure and temperature responses to be observed and recorded one of these recording options is necessary.

OPTIONAL ACCESSORIES

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

RECOMMENDED INSTRUMENTS

Barometer to determine the atmospheric pressure

REQUIREMENTS

Single phase electrical supply:

TH5-A:220/240V/1ph/50Hz @3 Amps

TH5-B:120V/1ph/60Hz @5 Amps

TH5-G:220V/1ph/60Hz @3 Amps

SHIPPING SPECIFICATION

Volume:0.34m3

Gross Weight:22kg

OVERALL DIMENSIONS

Vessel Assembly:

Height:800mm

Width:460mm

Depth:280mm

Electrical Console:

Height:220mm

Width:220mm

Depth:300mm