Heat exchanger rig for testing of heat performance of nanofluids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00557192" target="_blank" >RIV/61388998:_____/22:00557192 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Heat exchanger rig for testing of heat performance of nanofluids

Original language description

The subject of the functional sample is a heat exchanger rig, which serves for evaluation of overall thermal performance of nanofluids. The thermal performance is evaluated by means of comparative experiments conducted in the heat exchanger rig. The main part of the experimental rig is a pair of concentric-tube measuring heat exchangers (HEX). A tested nanofluid flows in turbulent regime through the “primary circuit” formed by the inner sides of the measuring HEXes connected in series. Between the HEXes, an electrical heater is installed, which can be set to an accurate heating power digitally. The primary circuit is driven by a gear pump whose revolutions are controlled in a closed loop to maintain the volumetric flow rate. After exiting the gear pump, the tested fluid flows through an auxiliary heat exchanger removing heat produced by the pump. In this way, we circumvent the effect of imperfection of the pump depending on its particular type. Outer sides of the measuring HEXes are connected in “secondary circuits” including refrigerated thermostatic baths, digitally controlled centrifugal pumps providing high flow rates, and flow meters with pulsed output. The whole experimental rig is equipped with accurate temperature and pressure sensors located at inlet and outlet of each HEX and near the flow meters. The temperature, pressure, and flow rate readings are sampled by a data acquisition device and stored in a measuring PC. The measured data enable to evaluate the transferred heat, net mechanical energy dissipated in HEXes, heat transfer coefficients, coefficients of performance, and other quantities allowing to compare the results of one fluid with another.

Czech name

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Czech description

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Type

G_funk - Functional sample

CEP classification

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OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/TH03020313" target="_blank" >TH03020313: Enhancement of cooling and heating efficiency of heat transfer fluids using nanoaditives</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Internal product ID

INV22-051

Numerical identification

INV22-051

Technical parameters

rozsah teplot testované kapaliny: 10 - 80°C,max. tlak ve výměníku: 10 bar

Economical parameters

Soustava výměníků umožňuje kvantifikovat přínos různých aditiv do testovaných kapalin z hlediska přestupu tepla

Application category by cost

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Owner IČO

61388998

Owner name

Ústav termomechaniky AV ČR v. v. i.

Owner country

CZ - CZECH REPUBLIC

Usage type

V - Výsledek je využíván vlastníkem

Licence fee requirement

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Web page

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