The energy saving potential of a rotary heat exchanger with bypass dampers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00364071" target="_blank" >RIV/68407700:21220/23:00364071 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.enbuild.2023.112934" target="_blank" >https://doi.org/10.1016/j.enbuild.2023.112934</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.enbuild.2023.112934" target="_blank" >10.1016/j.enbuild.2023.112934</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The energy saving potential of a rotary heat exchanger with bypass dampers

Popis výsledku v původním jazyce

The article deals with the possibilities of using a bypass damper in a rotary regenerative heat exchanger for heat recovery in ventilation and air conditioning system and calculates the energy savings related to overcoming the pressure loss of the exchanger. For the purposes of the analysis, a prototype heat exchanger with a wheel diameter of 1000 mm and bypass damper with a diameter of 200 mm was designed and constructed. The exchanger was subjected to an experimental investigation in order to determine its behaviour. The pressure loss of the exchanger, depending on the air flow rate, as well as the pressure loss for three nominal air flow rates, depending on the opening of the bypass damper, were measured. The measurement showed that the new exchanger design enables a reduction in the pressure loss of the exchanger by up to 49% compared to the original value. Based on the measured values, an analysis of the potential savings of electrical energy for driving fans in various European cities was carried out. The energy savings depend on the given climatic location where the exchanger will be used and on the operating time of the air handling unit. From the analyses carried out, it is clear that, by including the bypass damper, 18 to 44% of the electrical energy of the fan can be saved, which overcomes the pressure losses of the heat exchanger. Based on the current electricity prices, the return on the investment for the bypass damper was calculated based on the price of electricity at the given time and place (Prague - Czech Republic, 2022), which is from 0.5 to 3 years, depending on the type and period of operation of the air handling unit equipment, at common air velocities.

Název v anglickém jazyce

The energy saving potential of a rotary heat exchanger with bypass dampers

Popis výsledku anglicky

The article deals with the possibilities of using a bypass damper in a rotary regenerative heat exchanger for heat recovery in ventilation and air conditioning system and calculates the energy savings related to overcoming the pressure loss of the exchanger. For the purposes of the analysis, a prototype heat exchanger with a wheel diameter of 1000 mm and bypass damper with a diameter of 200 mm was designed and constructed. The exchanger was subjected to an experimental investigation in order to determine its behaviour. The pressure loss of the exchanger, depending on the air flow rate, as well as the pressure loss for three nominal air flow rates, depending on the opening of the bypass damper, were measured. The measurement showed that the new exchanger design enables a reduction in the pressure loss of the exchanger by up to 49% compared to the original value. Based on the measured values, an analysis of the potential savings of electrical energy for driving fans in various European cities was carried out. The energy savings depend on the given climatic location where the exchanger will be used and on the operating time of the air handling unit. From the analyses carried out, it is clear that, by including the bypass damper, 18 to 44% of the electrical energy of the fan can be saved, which overcomes the pressure losses of the heat exchanger. Based on the current electricity prices, the return on the investment for the bypass damper was calculated based on the price of electricity at the given time and place (Prague - Czech Republic, 2022), which is from 0.5 to 3 years, depending on the type and period of operation of the air handling unit equipment, at common air velocities.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TK02020006" target="_blank" >TK02020006: Zvyšování účinnosti rotačních regeneračních výměníků</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Energy and Buildings

ISSN

0378-7788

e-ISSN

1872-6178

Svazek periodika

285

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000950327700001

EID výsledku v databázi Scopus

2-s2.0-85150840368