Development of a design and performance prediction tool for the ground source heat pump system

Nagano, Katsunori; Katsura, Takao; Takeda, Sayaka

doi:10.1016/j.applthermaleng.2005.12.003

Cited by 144 publications

(74 citation statements)

References 3 publications

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“…First, designers should be allowed to easily change parameters and immediately evaluate results, as explained in Tomažič et al (2013). Even Nagano et al (2006) showed at what extent user-friendly design and performance prediction tools can help in the execution of quick feasibility studies. Several authors highlighted that simulators should be able to carry out reliable simulations in short times, e.g.…”

Section: Introductionmentioning

confidence: 99%

Development and calibration of a model for the dynamic simulation of fans with induction motors

Vaccarini

Carbonari

Casals

2017

Applied Thermal Engineering

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In this paper a model for the dynamic simulation of fans used in mechanical air supply systems is described. Thanks to this model, the behavior of fans subject to control by variable frequency drives (VFD) can be predicted, which includes power absorbed by the fan and expected ventilation rates. Hence, it can help design energy control systems for buildings. The proposed model was based on the Modelica language and was developed from the dynamic phasor domain representation, because this representation is a trade-off between the basic non transient representation, that is computationally efficient but cannot describe fan dynamics, and the dynamic time domain model, that is the most representative one but computationally very demanding. A comparison among these models showed that, within fan frequency variations typical of ventilation systems in buildings, the phasor domain model is as representative as the more complex dynamic time domain model in terms of prediction of the dynamic behavior, that is neglected by the basic non transient model. Moreover, the new phasor domain model was validated against measured data relative to a fan installed in a subway station in Barcelona. Thanks to this model, energy consumption of dynamically driven fans can be estimated at the simulation stage, at the expense of a reasonable computational effort.Peer ReviewedPostprint (author's final draft

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Section: Introductionmentioning

confidence: 99%

Development and calibration of a model for the dynamic simulation of fans with induction motors

Vaccarini

Carbonari

Casals

2017

Applied Thermal Engineering

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“…Kaygusuz and Ayhan [8] described and analyzed the heat pump co-operation system in which as the bottom source was used atmospheric air, with the upper one, where energy was stored in a battery filled with a phase-changeable state. Nagano et al [9] have developed an innovative system for visualizing and analyzing the efficiency of the heat pump operation, using a ground exchanger as the bottom source. The heat pump was used for heating purposes of the prototype greenhouse.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the efficiency of a hybrid foil tunnel heating system

Kurpaska

Pedryc

2017

E3S Web Conf.

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Abstract. The paper analyzes the efficiency of the hybrid system used to heat the foil tunnel. The tested system was built on the basis of heat gain in a cascade manner. The first step is to heat the water in the storage tank using the solar collectors. The second stage is the use of a heat pump (HP) in order to heat the diaphragm exchangers. The lower HP heat source is a cascade first stage buffer. In the storage tank, diaphragm exchangers used for solar collectors and heat pumps are installed. The research was carried out at a research station located in the University of Agriculture in Cracow. The aim was to perform an analysis of the efficiency of a hybrid system for the heating of a foil tunnel in the months from May to September. The efficiency of the entire hybrid system was calculated as the relation of the effect obtained in reference to the electrical power used to drive the heat pump components (compressor drive, circulation pump), circulation pumps and fans installed in the diaphragm heaters. The resulting effect was the amount of heat supplied to the interior of the object as a result of the internal air being forced through the diaphragm exchangers.

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“…Nagano et al [8], for instance, developed a design and performance prediction tool for GSHP systems using the infinite cylindrical heat source theory. Capozza et al [9] proposed a new approach to determining the penalty temperature, an index to evaluate the long-term behavior of the borehole field.…”

Section: Introductionmentioning

confidence: 99%

A multi-objective design optimization strategy for vertical ground heat exchangers

Huang

Wang

2015

Energy and Buildings

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. (2015). A multi-objective design optimization strategy for vertical ground heat exchangers. Energy and Buildings, A multi-objective design optimization strategy for vertical ground heat exchangers Abstract A multi-objective design optimization strategy for vertical U-tube ground heat exchangers (GHEs) is presented to minimize the system upfront cost and entropy generation number simultaneously. Five design variables of vertical U-tube GHEs, including borehole number, borehole depth, borehole radius, U-tube outer radius and fluid mass flow rate, are first selected via a global sensitivity analysis method, and then optimized by a genetic algorithm (GA) optimizer implemented in MATLAB. Based on the Pareto frontier obtained from the GA optimization, a decision-making strategy is then used to determine a final solution. Two case studies are presented to validate the effectiveness of the proposed strategy. The results based on a small scale GSHP system in Australia show that, compared to the original design, the use of this proposed strategy can decrease the total system cost (i.e. the upfront cost and 20 years' operating cost) by 9.5%. Compared to a singleobjective design optimization strategy, 6.2% more energy can be saved by using this multi-objective design optimization strategy. The result from a relatively large scale GSHP system implemented in China shows that a 5.2% decrease in the total system cost can be achieved by using this proposed strategy, compared with using the original design. The results based on a small scale GSHP system in Australia show that, compared to the original design, the use of this proposed strategy can decrease the total system cost (i.e. the upfront cost and 20 years' operating cost) by 9.5%. Compared to a single-objective design optimization strategy, 6.2% more energy can be saved by using this multi-objective design optimization strategy. The result from a relatively large scale GSHP system implemented in China shows that a 5.2% decrease in the total system cost can be achieved by using this proposed strategy, compared with using the original design.

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Development of a design and performance prediction tool for the ground source heat pump system

Cited by 144 publications

References 3 publications

Development and calibration of a model for the dynamic simulation of fans with induction motors

Development and calibration of a model for the dynamic simulation of fans with induction motors

Analysis of the efficiency of a hybrid foil tunnel heating system

A multi-objective design optimization strategy for vertical ground heat exchangers

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