Detailed and dynamic variable speed air source heat pump water heater model: Combining a zonal tank model approach with a grey box heat pump model

Deutz, Kevin Ruben; Charles, Gaspard-Louis; Cauret, Odile; Rullière, Romuald; Haberschill, Philippe

doi:10.1016/j.ijrefrig.2018.05.022

Cited by 12 publications

(4 citation statements)

References 46 publications

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“…For buildings, the energy is mainly consumed by heating, ventilation, airconditioning, and domestic hot water [1][2][3]. Heat pumps have been widely applied in the heating, ventilation, and airconditioning (HVAC) system of buildings, by virtue of their energy efficiency, environmental friendliness, compact structure, and ease of installation [4][5][6][7]. Depending on the type of heat sources, heat pumps can be divided into ground source heat pump (GSHP), air source heat pump (ASHP), and solarpowered heat pump (SPHP) [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Systematic Renovation Design of Surface Water Source Heat Pump for a Hot Spring Center Based on Thermodynamic Analysis

Liu¹

2021

IJHT

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Currently, the application and renovation of surface water heat source pump (WHSP) mainly attempt to optimize heat exchangers, water pumps, the overall system, and economic frictional head loss. The mathematical model is often established and solved with such optimization objectives as optimization parameters, control forms, costs, and feasibility of investment and construction. There are relatively few studies that optimize the operating conditions with the minimal total energy consumption of system operations, and, on this basis, pursue global optimization design of the WSHP system. Therefore, this paper aims to carry out a systematic renovation design of the surface WSHP in a hot spring center in the national forest park of northern Guilin, southwestern China’s Guangxi Zhuang Autonomous Region. The project mainly covers the design of hot spring system, air-conditioning system, and hot water system, as well as the exergy analysis of WSHP system. Among them, the design of hot spring system includes the regulation of raw water, cold water, and warmed water; the constant temperature control of hot spring pools; the waste heat utilization of warmed water from the pools. The scientific nature of the design was proved through experiments.

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Section: Introductionmentioning

confidence: 99%

Systematic Renovation Design of Surface Water Source Heat Pump for a Hot Spring Center Based on Thermodynamic Analysis

Liu¹

2021

IJHT

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“…Tangwe and Simon [23] compared the operation performance of split and integrated type air source heat pump water heater via modeling and simulation and found a better performance of the split type model. Deutz et al [24] used a dynamic gray-box thermodynamic model to simulate the heat pump components, while a zonal model allows simulating convection and thermal stratification in the tank. The authors found that the potential improvement of using a zonal model instead of a simpler 1D model is negligible.…”

Section: Introductionmentioning

confidence: 99%

“…The literature classifies heat pump modelizations into two categories [24]: fully empirical models (black box) or semi-emprical component based models (gray box). An example of both types of models was presented by Tran et al [26] and Peng et al [27], respectively.…”

Section: Introductionmentioning

confidence: 99%

One-Dimensional Model of a Compact DHW Heat Pump with Experimental Validation

Aguilar

Crespí-Llorens

Aledo³

et al. 2021

Energies

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The current work presents a computationally cost-effective numerical model that successfully simulates a heat pump water heater (HPWH) under typical working conditions of dwellings. The model’s main components are a stratified tank and the heat-pump unit. Both systems are coupled, since a good prediction of water temperature is needed to accurately predict the heat-pump performance. Ten thermocouples measured the tank wall temperature. Measurements and simulations were performed under challenging conditions of a heavy stratification. The 190 L tank stratification was successfully modeled employing a 1D model, experimentally adjusted by three tapping cycles, with 6 × 22, 6 × 33, and 3 × 33 L consumptions, covering flowrates of 4 and 6 L/min. Water temperature is obtained with an uncertainty of 2.6 °C while the heat-pump was ON. A black box model has been used to obtain the heat-pump performance out of the external and condenser temperatures. For the analyzed days, the COP estimation presents an uncertainty of only 5.1%. Finally, an application example is included. It was used to simulate six tapping cycles of the European standard for heat pump water heaters testing (EN 16147). The results show the possibilities for heat-pump manufacturers of applying this calibrated model to predict the performance of HPWHs under different conditions.

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“…The main drawback of such combined models is the low robustness and high computational effort, since two simulations engines running at the same time are needed. To overcome such issues, a tool often used to simulate complex multi-domain systems is the Modelica language, thanks to its low computational demand and a vast number of libraries including components for several energy systems, comprising heat pumps and chillers for commercial and residential applications [31][32][33][34][35].…”

mentioning

confidence: 99%

Hybrid Adsorption-Compression Systems for Air Conditioning in Efficient Buildings: Design through Validated Dynamic Models

et al. 2019

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Hybrid sorption-compression systems are gaining interest for heating/cooling/ refrigeration purposes in different applications, since they allow exploiting the benefits of both technologies and a better utilization of renewable sources. However, design of such components is still difficult, due to the intrinsic complexity of the systems and the lack of reliable models. In particular, the combination of adsorption-compression cascade unit has not been widely explored yet and there are no simulations or sizing tools reported in the literature. In this context, the present paper describes a model of a hybrid adsorption-compression system, realised in Modelica language using the commercial software Dymola. The models of the main components of the sorption and vapour compression unit are described in details and their validation presented. In addition, the integrated model is used for proving the feasibility of the system under dynamic realistic conditions and an example of the technical sizing that the model is able to accomplish is given.

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Detailed and dynamic variable speed air source heat pump water heater model: Combining a zonal tank model approach with a grey box heat pump model

Cited by 12 publications

References 46 publications

Systematic Renovation Design of Surface Water Source Heat Pump for a Hot Spring Center Based on Thermodynamic Analysis

Systematic Renovation Design of Surface Water Source Heat Pump for a Hot Spring Center Based on Thermodynamic Analysis

One-Dimensional Model of a Compact DHW Heat Pump with Experimental Validation

Hybrid Adsorption-Compression Systems for Air Conditioning in Efficient Buildings: Design through Validated Dynamic Models

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