A model-based optimal control strategy for ground source heat pump systems with integrated solar photovoltaic thermal collectors

Hybrid Ground-Source Heat Pump (HGSHP) systems have been introduced as a remedy to overcome the current financial hurtles associated to the installation of geo-exchange technology. However, there still remains potential for increased economic feasibility of geo-exchange through proactive operation prefaced with higher level control. This study introduces a control strategy referred to as an off-peak ground pre-cool, employing time-of-use conscious operating logic capable of facilitating artificial bore-field pre-conditioning to improve a geo-exchange system’s cooling mode performance. Artificial pre-conditioning of a system’s bore-field introduces the potential to improve the bore-field’s thermal characteristics in a controlled manner. With improved thermal characteristics a bore-field can be exploited more efficiently during the following peak periods; introducing additional economic incentives by reducing peak power consumption attributed to space cooling. This study presents a multifaceted approach which intends to concurrently address improving system economics and aid in the balancing of the electrical grid.

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Simulation and operation control strategy of ground source thermal energy management system by cold and heat auxiliary technology

Thermal Science ◽

10.2298/tsci191110106x ◽

2020 ◽

Vol 24 (5 Part B) ◽

pp. 3157-3166

Author(s):

Shengtao Xiong ◽

Zhenxing Liu ◽

Qunqiao Li ◽

Yuan Chen ◽

Xiaoyan Cai ◽

...

Keyword(s):

Energy Management ◽

Heat Pump ◽

Thermal Energy ◽

Control Strategy ◽

Management System ◽

Energy Management System ◽

Ground Source Heat Pump ◽

Hybrid Heating ◽

Ground Source ◽

Refrigeration Unit

To explore the performance of the ground source thermal energy management system under the cold and heat sources, based on the cold and heat auxiliary technology, a ground source thermal energy composite management system is constructed and simulated. The constructed ground source heat pump-refrigeration unit-hybrid heating management system of urban heating networks, as well as the simple system, are analyzed and investigated in terms of power consumption and underground temperature control. The research results show that the constructed ground source heat pump-refrigeration unit-hybrid heating management system of the urban heating network has lower power and energy consumption than a simple system during the same period, which meets the economic requirements and guarantees the system with relatively low energy consumption. For underground temperature control, the constructed system is more stable than a simple system without excessive temperature fluctuations. The operation control strategy of the constructed system is mainly for chiller units, heat pump units, cooling towers, source side, and side circulation water pump modules. In summary, the constructed ground source heat pump-refrigeration unit-hybrid heating management system of an urban heating network based on the ground source heat pump meets the requirements for energy consumption and temperature control and can operate the control strategy normally. The results are significant for subsequent researches on the ground source thermal energy management system based on cold and heat auxiliary technology.

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Derivation of a Rule-Based Optimal Control Strategy for the Oxidation Ditch Process Using a Mathematical Model Based on Field Data

Computer Techniques in Environmental Studies IV ◽

10.1007/978-94-011-1874-3_31 ◽

1992 ◽

pp. 439-453

Author(s):

J. P. Lumbers ◽

M. von Sperling ◽

S. C. Cook

Keyword(s):

Mathematical Model ◽

Optimal Control ◽

Control Strategy ◽

Field Data ◽

Oxidation Ditch ◽

Optimal Control Strategy ◽

Rule Based ◽

Model Based

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Performance Prediction Model Based on Multi-Task Learning and Co-Evolutionary Strategy for Ground Source Heat Pump System

IEEE Access ◽

10.1109/access.2019.2936508 ◽

2019 ◽

Vol 7 ◽

pp. 117925-117933

Author(s):

Zhaoyi Zhuang ◽

Chen Wei ◽

Bing Li ◽

Peng Xu ◽

Yifei Guo ◽

...

Keyword(s):

Prediction Model ◽

Heat Pump ◽

Performance Prediction ◽

Evolutionary Strategy ◽

Ground Source Heat Pump ◽

Pump System ◽

Heat Pump System ◽

Model Based ◽

Task Learning ◽

Ground Source

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Research on the Simulation and Operation Control Strategy of Hybrid Ground Source Heat Pump System

Procedia Engineering ◽

10.1016/j.proeng.2017.10.380 ◽

2017 ◽

Vol 205 ◽

pp. 1507-1514 ◽

Cited By ~ 1

Author(s):

Di Zhao ◽

Ping Cui ◽

Yuan Gao ◽

Wenke Zhang ◽

Haipeng An

Keyword(s):

Heat Pump ◽

Control Strategy ◽

Ground Source Heat Pump ◽

Pump System ◽

Heat Pump System ◽

Ground Source ◽

Operation Control

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Characterizing the Effect of an Off-Peak Ground Pre-1 Cool Control Strategy 2 on Hybrid Ground Source Heat Pump Systems

10.32920/ryerson.14636166 ◽

2021 ◽

Author(s):

Adam Alexandar Alaica ◽

Seth B. Dworkin

Keyword(s):

Power Consumption ◽

Heat Pump ◽

Control Strategy ◽

Peak Power ◽

Operating Efficiency ◽

Base Case ◽

Peak Time ◽

Ground Source Heat Pump ◽

Ground Source ◽

Peak Power Consumption

Geo-exchange systems are a sustainable alternative to conventional space conditioning systems due to their high operating efficiency, resulting in reduced energy consumption and greenhouse gas emissions. However, geo-exchange’s ability to penetrate the market has been throttled by large capital investments, resulting in undesirable payback periods. Optimized hybrid ground source heat pump systems (HGSHP) systems have been introduced as a remedy to overcome the current economic hurtles associated to the installation of geo-exchange systems. In both the literature, as well as in practice, there still remains potential for increased economic feasibility of this technology through integration of intelligent operational strategies. This paper presents a novel control methodology referred to as an off-peak ground pre-cool strategy, employing a time-of-use conscious operating logic which artificially pre-condition the system’s bore-field. Reducing peak power consumption is achieved by creating improved thermal characteristics during mid-peak/peak time-of-use operating brackets. A comprehensive numerical model was developed to characterize the operation of HGSHP systems for three real case studies. The mode implemented a base case set-point control scheme, used as a reference to assess the operational benefit of the proposed off-peak ground pre-cool control strategy. The preliminary analyses indicated operational cost savings of up to 16.4%, under specific pre-cool scheduling. The strategy indicated reductions in both carbon emission and peak power consumption of up t 19 15.0% and 58.5%, respectively. In all cases increasing cooling supplied by the hybrid geo 20 exchange system was indicated, with a maximum observed capacity increase of 43.7%.

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