Simulation of an Air-to-Water Heat Pump System to Evaluate the Impact of Demand-Side-Management Measures on Efficiency and Load-Shifting Potential

2013 ◽  
Vol 2 (1) ◽  
pp. 90-99 ◽  
Author(s):  
Marek Miara ◽  
Danny Günther ◽  
Zaphod L. Leitner ◽  
Jeannette Wapler
Keyword(s):  
Heat Pump ◽  
Demand Side Management ◽  
Demand Side ◽  
Pump System ◽  
Load Shifting ◽  
Heat Pump System ◽  
Management Measures ◽  
The Impact

scholarly journals Demand side management analysis of a commercial water loop heat pump system

2018 ◽  
Vol 79 (3) ◽  
pp. 111-118 ◽  
Author(s):  
Gianluca Coccia ◽  
Alessia Arteconi ◽  
Paola D’Agaro ◽  
Fabio Polonara ◽  
Giovanni Cortella
Keyword(s):  
Heat Pump ◽  
Demand Side Management ◽  
Demand Side ◽  
Pump System ◽  
Heat Pump System

scholarly journals Demand side management analysis of a supermarket integrated HVAC, refrigeration and water loop heat pump system

2019 ◽  
Vol 152 ◽  
pp. 543-550 ◽  
Author(s):  
Gianluca Coccia ◽  
Paola D’Agaro ◽  
Giovanni Cortella ◽  
Fabio Polonara ◽  
Alessia Arteconi
Keyword(s):  
Heat Pump ◽  
Demand Side Management ◽  
Demand Side ◽  
Pump System ◽  
Heat Pump System

scholarly journals Efficiency and area demand of multi-layer ground heat exchanger using phase change of water

2019 ◽  
Vol 282 ◽  
pp. 02027
Author(s):  
Hauke Hirsch ◽  
Hans Petzold ◽  
John Grunewald
Keyword(s):  
Heat Exchanger ◽  
Numerical Simulations ◽  
Heat Pump ◽  
Simulation Software ◽  
Passive Cooling ◽  
Ground Heat Exchanger ◽  
Pump System ◽  
Heat Pump System ◽  
German Standard ◽  
The Impact

We conducted numerical simulations of a heat pump system connected to a horizontal ground heat exchanger (HGHX), using a coupling of the hygro-thermal simulation software DELPHIN with Modelica. The aim was to study the influence of different HGHX sizes and assemblies as well as the impact of passive cooling on the systems efficiency. We found that the required ground area could be reduced by up to 70 % compared to the recommendation of German standard when the pipes are placed in multiple layers. Passive cooling is possible but has a negligible effect on the systems efficiency.

scholarly journals Long-Term Temperature Evaluation of a Ground-Coupled Heat Pump System Subject to Groundwater Flow

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 96
Author(s):  
Nehed Jaziri ◽  
Jasmin Raymond ◽  
Nicoló Giordano ◽  
John Molson
Keyword(s):  
Groundwater Flow ◽  
Heat Pump ◽  
Exchange Capacity ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Coupled Heat Pump ◽  
Darcy Flux ◽  
Advective Heat Transfer ◽  
Heat Injection ◽  
The Impact

The performance of ground-coupled heat pump systems (GCHPs) operating under significant groundwater flow can be difficult to predict due to advective heat transfer in the subsurface. This is the case of the Carignan-Salières elementary school located on the south shore of the St. Lawrence River near Montréal, Canada. The building is heated and cooled with a GCHP system including 31 boreholes subject to varying groundwater flow conditions due to the proximity of an active quarry being irregularly dewatered. A study with the objective of predicting the borehole temperatures in order to anticipate potential operational problems was conducted, which provided an opportunity to evaluate the impact of groundwater flow. For this purpose, a numerical model was calibrated using a full-scale heat injection test and then run under different scenarios for a period of twenty years. The heat exchange capacity of the GCHP system is clearly enhanced by advection when the Darcy flux changes from 6 × 10−8 m s−1 (no dewatering) to 8 × 10−7 m s−1 (high dewatering). This study further suggests that even the lowest groundwater flow condition can be beneficial to avoid a progressive cooling of the subsurface due to the unbalanced building loads, which can have important impacts for design of new systems.

Influence of Temperature Parameter Change on Lithium Bromide Absorption Heat Pump Performance

2013 ◽  
Vol 291-294 ◽  
pp. 1670-1674
Author(s):  
Biao Li ◽  
Jiang Fan
Keyword(s):  
Power Plant ◽  
Heat Pump ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Optimal Operation ◽  
Pump System ◽  
Absorption Heat Pump ◽  
Heat Pump System ◽  
Heat Pump Unit ◽  
The Impact

It is the new way of the thermal power plant energy conservation to recycling plant circulating water waste heat for heating with the heat pump technology. The recovery of low temperature waste heat is the background. And lithium bromide absorption heat pump is the object of this study. The impact of changes in temperature parameters on the performance of heat pump unit is analyzed. As a theoretical basis for the design of the heat pump system and power plant heat pump unit’s optimal operation provide a reference. The result provides a theoretical reference for the optimal operation of the heat pump system design and power plant heat pump units.

scholarly journals Net-Metering vs. Net-Billing from the Investors Perspective—Impacts of Changes in RES Financing in Poland on the Profitability of a Joint Photovoltaic Panels and Heat Pump System

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 227
Author(s):  
Mariusz Trela ◽  
Anna Dubel
Keyword(s):  
Natural Gas ◽  
Heat Pump ◽  
Net Present Value ◽  
Renewable Energy Sources ◽  
Pump System ◽  
Heat Pump System ◽  
Photovoltaic Panels ◽  
Profitability Analysis ◽  
Net Metering ◽  
The Impact

The paper explores the impacts of changes in renewable energy sources (RES) financing in Poland on the profitability of coupled photovoltaic panels and heat pump systems. The profitability analysis is conducted with the use of Net Present Value calculation and the return on investment period. The degree of change in profitability of using photovoltaic panels in Poland is dependent on the method of their financing. The analysis is carried out for two different photovoltaic support schemes: (1) the net-metering scheme currently in force in Poland; (2) the net-billing system scheduled for implementation in the year 2022. It is assumed for the analysis that two alternative heating and electricity supply systems for a single-family building will be operated: (a) a standard solution used in Poland consisting of a natural gas-fired boiler for heating and the purchase of electricity from the power grid, (b) an air/water heat pump used to heat the building, and electricity obtained from photovoltaic panels, also used to power the heat pump. A sensitivity analysis is carried out, examining the impact of several key parameters relevant for the profitability of such investments, such as average annual increase in the purchasing or selling prices of electricity, purchasing prices of natural gas, and inflation rate. The conclusions concern the possible consequences of introducing a new support scheme for photovoltaics in Poland. The highest profitability of all considered solutions is for the current scenario for heat pump and pv installation with the capacity to meet the demand in the last year of operation. The introduction of changes in the new RES law (2021) in Poland will reduce the profitability of investments in pv panels, leading to a slowdown in the investments in the pv installations.

Experiment Study on Ground Temperature Recovery and Operating Performance of Intermittent Heat Storage in GSHP System

2010 ◽  
Author(s):  
Sufen Li ◽  
Lanhua Dai ◽  
Yan Shang
Keyword(s):  
Soil Temperature ◽  
Heat Pump ◽  
Heat Exchangers ◽  
Heat Storage ◽  
Borehole Wall ◽  
Pump Unit ◽  
Pump System ◽  
Heat Pump System ◽  
Heat Pump Unit ◽  
The Impact

The ground source heat pump system (GSHP) continuous operation will result in heat accumulation of the soil around the underground heat exchangers leading the descend operation performance of heat pump system. Based on experiment of GSHP system in summer season, the temperature distribution of humid soil around the vertical boreholes, the power consumption of the heat pump unit, the water temperature in the inlet and outlet of the underground heat exchangers, the heat release rate of per unit length of the buried pipes in humid soil and the cooling coefficient of performance (COP) for the heat pump unit were acquired during the different intermittent heat storage modes. This study investigated the impact of soil temperature change around the borehole wall on the performance of heat pump operation, the influence of intermittent heat storage on the soil temperature near the borehole wall and the performance of heat pump unit, and the effect of intermittent heat storage process on the recovery rate of soil temperature. The results showed that proper control of the operation and interval time of GSHP can effectively improve the soil temperature field around the underground heat exchangers and enhance the performance of GSHP system, thus achieving high efficiency operation of heat pump units.

scholarly journals Impact of Standing Column Well Operation on Carbonate Scaling

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2222
Author(s):  
Léo Cerclet ◽  
Benoît Courcelles ◽  
Philippe Pasquier
Keyword(s):  
Heat Pump ◽  
Urban Areas ◽  
Calcium Concentration ◽  
Mitigation Measures ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Field Samples ◽  
The Impact

Standing column well constitutes a recent promising solution to provide heating or cooling and to reduce greenhouse gases emissions in urban areas. Nevertheless, scaling issues can emerge in presence of carbonates and impact their efficiency. Even though a thermo-hydro-geochemical model demonstrated the impact of the water temperature on carbonate concentration, this conclusion has not been yet demonstrated by field investigations. To do so, an experimental ground source heat pump system connected to a standing column well was operated under various conditions to collect 50 groundwater samples over a period of 267 days. These field samples were used for mineral analysis and laboratory batch experiments. The results were analyzed with multivariate regression and geochemical simulations and confirmed a clear relationship between the calcium concentrations measured in the well, the temperature and the calcite equilibrium constant. It was also found that operating a ground source heat pump system in conjunction with a small groundwater treatment system allows reduction of calcium concentration in the well, while shutting down the system leads to a quite rapid increase at a level consistent with the regional calcium concentration. Although no major clogging or biofouling problem was observed after two years of operation, mineral scales made of carbonates precipitated on a flowmeter and hindered its operation. The paper provides insight on the impact of standing column well on groundwater quality and suggests some mitigation measures.

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