Gray-box entropy-based model of a water-source NH 3 -H 2 O gas-driven absorption heat pump

Aprile, Marcello; Scoccia, Rossano; Toppi, Tommaso; Motta, Mario

doi:10.1016/j.applthermaleng.2017.02.099

Cited by 6 publications

(6 citation statements)

References 8 publications

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“…The GHP model is based on an accurate grey box model, described in [14]. This model considers a 40 kW brine-to-water commercial unit and divides the heat pump model in three main sub models: a grey-box model of the combustion chamber, a lumped parameter model of the flue gas heat exchanger, and an entropy-based model of the ammonia water Generator Absorber heat eXchange (GAX) cycle [14]. The GAX cycle gives the possibility to recover part of the heat output of the absorber to pre-heat the rich solution before it is sent to the generator.…”

Section: Gas Driven Absorption Heat Pump Modelmentioning

confidence: 99%

“…In addition, the diagram shows the heat recovered, in a component of the cycle called SCA, to pre-heat the rich solution. The model needs a series of predefined parameters and experimentally identified parameters to calculate the internal temperatures as described in [15], thus a set of experimental data similar to the one in [14] have been measured on a low capacity GHP prototype. Moreover, to obtain an air-water heat pump model, a hydronic loop with brine as heat carrier fluid has been added.…”

Section: Gas Driven Absorption Heat Pump Modelmentioning

confidence: 99%

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Energy, environmental and economic analysis of electric vapour compression and gas driven absorption heat pumps for single-family houses

et al. 2021

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The aim of this paper is to compare energy consumptions, CO2 emissions, and operative costs of condensing boilers, electric vapour compression heat pumps and gas driven absorption heat pumps to provide space heating and domestic hot water. The analysis is performed for 140 m2 single-family houses in five different Italian cities whose envelope features depend on the location. For each location, two different envelope conditions are considered. The first one is a non-insulated building, while the second one is the same building, but an external thermal insulation is added on vertical walls and roof. To avoid internal renovation, radiators are maintained as emission system. Combined dynamic simulations are performed to appreciate building and system interactions. A 6 second time step is set to evaluate properly interactions and the DHW profile demand. In addition, the GHP dynamic model is a grey box model experimentally validated. The results show that electric vapour compression heat pumps reach the highest non-renewable primary energy savings (>32%) compared to condensing boilers, but their operative costs are higher due to the higher specific cost of electricity in Italy. Gas driven absorption heat pumps achieve a lower consumption reduction than electric heat pumps (>22%), but they have also the minimum operative cost among the three technologies.

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Section: Gas Driven Absorption Heat Pump Modelmentioning

confidence: 99%

Section: Gas Driven Absorption Heat Pump Modelmentioning

confidence: 99%

Energy, environmental and economic analysis of electric vapour compression and gas driven absorption heat pumps for single-family houses

et al. 2021

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“…The nonlinear least-squares optimization method and trust-region reflective algorithm were used for the estimation of the WB model's parameters. Aprile et al [108] devised a serial GB model for prediction of gas utilization efficiency and the heating capacity of a water-source gas-driven absorption heat pump. Linear interpolation was used for parameter identification.…”

Section: Heat Treatment Processesmentioning

confidence: 99%

“…Application Category Process GB Type Target BB Type [65][66][67] Industrial robot estimation and control process automation serial "motor angular speed", "deflection of a piezoelectric micromanipulator", "machine position" "weighted logarithmic least squares", "ANN", "weighted nonlinear least squares and weighted logarithmic least squares" [95][96][97][98][99][100][101][102] Miscellaneous estimation and control "reactive systems" "serial", "paralel" "reacytion rate", "product composition", "heat released", "design of CSTR", "concentration distributions in the context of modelling a reaction-advection-diffusion system" "LS-SVM", "ANN and EKF", "ARXIs", [103][104][105][106][107][108][109][110][111] Miscellaneous estmation and control heat treatment process serial "heat release inside the reactor", "settled material breaking away from the heat transfer surface", "outlet temperatures of plate heat exchangers", "temperature of combustion chamber", "boiler temperature", "electricity consumption of a refrigeration system", "spray dryer performance", "temperature within an imperfectly mixed fluid" "LS", "recursive least squares identification", "taylor series", "ANN", "nonlinear least squares optimization", "linear interpolation", "MLE"…”

Section: Paper Industrymentioning

confidence: 99%

Gray-box Soft Sensors in Process Industry: Current Practice, and Future Prospects in Era of Big Data

et al. 2020

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Virtual sensors, or soft sensors, have greatly contributed to the evolution of the sensing systems in industry. The soft sensors are process models having three fundamental categories, namely white-box (WB), black-box (BB) and gray-box (GB) models. WB models are based on process knowledge while the BB models are developed using data collected from the process. The GB models integrate the WB and BB models for addressing the concerns, i.e., accuracy and intuitiveness, of industrial operators. In this work, various design aspects of the GB models are discussed followed by their application in the process industry. In addition, the changes in the data-driven part of the GB models in the context of enormous amount of process data collected in Industry 4.0 are elaborated.

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“…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]. Water source heat pump (WSHP) is the most applied type of GSHP.…”

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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Gray-box entropy-based model of a water-source NH 3 -H 2 O gas-driven absorption heat pump

Cited by 6 publications

References 8 publications

Energy, environmental and economic analysis of electric vapour compression and gas driven absorption heat pumps for single-family houses

Energy, environmental and economic analysis of electric vapour compression and gas driven absorption heat pumps for single-family houses

Gray-box Soft Sensors in Process Industry: Current Practice, and Future Prospects in Era of Big Data

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

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