Heat Pump for Water Preparation in a Block of Flats

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21720%2F17%3A00318596" target="_blank" >RIV/68407700:21720/17:00318596 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Heat Pump for Water Preparation in a Block of Flats

Popis výsledku v původním jazyce

Recent trends in building construction in central Europe show a growing number of well insulated residential buildings. The heat demand for domestic hot water preparation is, in those applications, similar or higher than for space heating. Regular vapour compression heat pumps reach a relatively low SPF 2.5 in such applications. The way to increase SPF is to use a heat pump with multiple heat exchangers on the highpressure side (desuperheater, condenser, and subcooler) and a special hot water storage tank with three internal heat exchangers for good temperature stratification. A prototype of a heat pump with a desuperheater and subcooler was developed and a mathematical model of a refrigerant cycle was tested on it. The model of the heat pump describes the heating capacity and power input with an average relative deviation lower than 5 %. The validated model was used in simulations of a system for hot water preparation in a block of flats. The water draw in the simulation was set under the European standard and measured data from real applications. The results of simulations show SPF improvement by 26 % for a heat pump with a desuperheater and subcooler in comparison with a standard heat pump.

Název v anglickém jazyce

Heat Pump for Water Preparation in a Block of Flats

Popis výsledku anglicky

Recent trends in building construction in central Europe show a growing number of well insulated residential buildings. The heat demand for domestic hot water preparation is, in those applications, similar or higher than for space heating. Regular vapour compression heat pumps reach a relatively low SPF 2.5 in such applications. The way to increase SPF is to use a heat pump with multiple heat exchangers on the highpressure side (desuperheater, condenser, and subcooler) and a special hot water storage tank with three internal heat exchangers for good temperature stratification. A prototype of a heat pump with a desuperheater and subcooler was developed and a mathematical model of a refrigerant cycle was tested on it. The model of the heat pump describes the heating capacity and power input with an average relative deviation lower than 5 %. The validated model was used in simulations of a system for hot water preparation in a block of flats. The water draw in the simulation was set under the European standard and measured data from real applications. The results of simulations show SPF improvement by 26 % for a heat pump with a desuperheater and subcooler in comparison with a standard heat pump.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

20704 - Energy and fuels

Projekt

<a href="/cs/project/ED2.1.00%2F03.0091" target="_blank" >ED2.1.00/03.0091: Univerzitní centrum energeticky efektivních budov (UCEEB)</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Vytápění, větrání, instalace

ISSN

1210-1389

e-ISSN

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Svazek periodika

26.

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

333-341

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85040165284