Modeling of an Indirect Solar Assisted Heat Pump System for a High Performance Residential House

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Jenny Chu ◽  
Wilkie Choi ◽  
Cynthia A. Cruickshank ◽  
Stephen J. Harrison
Keyword(s):  
Heat Pump ◽  
High Performance ◽  
Simulation Software ◽  
Hot Water ◽  
Solar Thermal ◽  
Working Fluid ◽  
Pump System ◽  
Heat Pump System ◽  
Solar Decathlon ◽  
Solar Thermal Collectors

The combination of solar thermal and heat pump systems as a single solar assisted heat pump (SAHP) system can significantly reduce residential energy consumption in Canada. As a part of Team Ontario's efforts to develop a high performance house for the U.S. Department of Energy's Solar Decathlon 2013 Competition, an integrated mechanical system (IMS) consisting of a SAHP was investigated. The system was designed to provide domestic hot water (DHW), space-heating, space-cooling, and dehumidification. The system included a cold and a hot thermal storage tanks and a heat pump to move energy from the low temperature reservoir to the hot reservoir. Solar thermal collectors supplied heat to the cold storage and operated at a higher efficiency due to the heat pump reducing the temperature of the collector working fluid. The combination of the heat pump and solar thermal collectors allows more heat to be harvested at a lower temperature, and then boosted to a suitable temperature for domestic use via the heat pump. The IMS and the building's energy loads were modeled using the TRNSYS simulation software. A parametric study was conducted to optimize the control, sizing, and configuration of the system. The simulation results suggested that the investigated system can achieve a free energy ratio (FER) of about 0.583 for the high performance house designed for the Ottawa climate.

Modelling of an Indirect Solar-Assisted Heat Pump System for a High Performance Residential House

2013 ◽  
Author(s):  
Jenny Chu ◽  
Cynthia A. Cruickshank ◽  
Wilkie Choi ◽  
Stephen J. Harrison
Keyword(s):  
Heat Pump ◽  
High Performance ◽  
Simulation Software ◽  
Hot Water ◽  
Solar Thermal ◽  
Working Fluid ◽  
Space Heating ◽  
Pump System ◽  
Heat Pump System ◽  
Solar Thermal Collectors

Heat pumps are commonly used for residential space-heating and cooling. The combination of solar thermal and heat pump systems as a single solar-assisted heat pump (SAHP) system can significantly reduce residential energy consumption in Canada. As a part of Team Ontario’s efforts to develop a high performance house for the 2013 DOE Solar Decathlon Competition, an integrated mechanical system (IMS) consisting of a SAHP was investigated. The system is designed to provide domestic hot water, space-heating, space-cooling and dehumidification. The system included a cold and a hot thermal storage tank and a heat pump to move energy from the low temperature reservoir, to the hot. The solar thermal collectors supplies heat to the cold storage and operate at a higher efficiency due to the heat pump reducing the temperature of the collector working fluid. The combination of the heat pump and solar thermal collectors allows more heat to be harvested at a lower temperature, and then boosted to a suitable temperature for domestic use via the heat pump. The IMS and the building’s energy loads were modeled using the TRNSYS simulation software. A parametric study was conducted to optimize the control, sizing and configuration of the system. This paper provides an overview of the model and summarizes the results of the study. The simulation results suggested that the investigated system can achieve a free energy ratio of about 0.583 for a high performance house designed for the Ottawa climate.

scholarly journals Technical feasibility study of net-zero energy house for Canada - case study of Team North 2009 US DOE Solar Decathlon competition

2021 ◽  
Author(s):  
Toktam Saeid
Keyword(s):  
Heat Pump ◽  
Hot Water ◽  
Solar Thermal ◽  
Thermal System ◽  
Pv System ◽  
Pump System ◽  
Heat Pump System ◽  
Solar Decathlon ◽  
Variable Capacity ◽  
Solar Thermal System

In October 2009, Team North competed in the US DOE 2009 Solar Decathlon competition. Team North's mission was to design and deliver North House, an energy efficient solar-powered home while training Canada's next generation of leaders in sustainable design. In North House, the PV system on the roof was the primary energy generation, complimented by a custom PV cladding system on the south, east and west facades. A solar assisted heat pump system, including a three-tank heat transfer and storage system, the horizontally mounted evacuated-tube solar thermal collectors on the roof and a variable capacity heat pump met the hot water and space heating demands. A second variable capacity heat pump was utilized for space cooling. The solar thermal system was studied using TRNSYS simulation. For the initial assessments the simulations were run for Baltimore. Then, the analyses were extended to different cities across Canada. In all scenarios the same house was linked to the system. The minimum annual solar fraction of the different cities was 64% and it rose up to 81%. Finally, the data measured during the competition were analyzed and compared with the data resulting from the simulation. According to competition measures, during the 10 days of competition in Washington DC, the PV system generated 271.6kWh of electricity and the solar thermal system produced 91.7kWh while the house consumption was 294.1kWh. As a result, North House was evidently a net-positive house.

scholarly journals Technical feasibility study of net-zero energy house for Canada - case study of Team North 2009 US DOE Solar Decathlon competition

2021 ◽  
Author(s):  
Toktam Saeid
Keyword(s):  
Heat Pump ◽  
Hot Water ◽  
Solar Thermal ◽  
Thermal System ◽  
Pv System ◽  
Pump System ◽  
Heat Pump System ◽  
Solar Decathlon ◽  
Variable Capacity ◽  
Solar Thermal System

In October 2009, Team North competed in the US DOE 2009 Solar Decathlon competition. Team North's mission was to design and deliver North House, an energy efficient solar-powered home while training Canada's next generation of leaders in sustainable design. In North House, the PV system on the roof was the primary energy generation, complimented by a custom PV cladding system on the south, east and west facades. A solar assisted heat pump system, including a three-tank heat transfer and storage system, the horizontally mounted evacuated-tube solar thermal collectors on the roof and a variable capacity heat pump met the hot water and space heating demands. A second variable capacity heat pump was utilized for space cooling. The solar thermal system was studied using TRNSYS simulation. For the initial assessments the simulations were run for Baltimore. Then, the analyses were extended to different cities across Canada. In all scenarios the same house was linked to the system. The minimum annual solar fraction of the different cities was 64% and it rose up to 81%. Finally, the data measured during the competition were analyzed and compared with the data resulting from the simulation. According to competition measures, during the 10 days of competition in Washington DC, the PV system generated 271.6kWh of electricity and the solar thermal system produced 91.7kWh while the house consumption was 294.1kWh. As a result, North House was evidently a net-positive house.

scholarly journals Viability Of Hybrid Ground Source Heat Pump System With Solar Thermal Collectors

2021 ◽  
Author(s):  
Farzin M. Rad
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Simulation Software ◽  
Solar Thermal ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Solar Thermal Collectors ◽  
Ground Loop

This thesis presents a study for examining the viability of hybrid ground source heat pump (GSHP) systems that use solar thermal collectors as the supplemental component in heating dominated buildings. Loads for an actual house in the City of Milton near Toronto were estimated. TRNSYS, a system simulation software tool, was used to model the yearly performance of conventional GSHP as well as the proposed hybrid GSHP system. The house was equipped with a data monitoring system which was installed to read and record fluid flow, temperature and electricity consumption in different components of the system. The actual yearly data collected from the site was examined against the simulation results. In addition, a sensitivity analysis was carried out to determine the relationship between the solar collector area and the ground loop heat exchanger (GHX) length. It was shown that the ratio of GHX length reduction to solar panel area of 4.7 m/m This study demonstrates that a hybrid GSHP system, combined with solar thermal collectors, is a feasible choice for space conditioning for heating dominated houses. It was shown that the solar thermal energy storage in the ground could reduce a large amount of ground loop heat exchanger length. Combining three solar thermal collectors with a total area of 6.81m

scholarly journals Viability Of Hybrid Ground Source Heat Pump System With Solar Thermal Collectors

2021 ◽  
Author(s):  
Farzin M. Rad
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Simulation Software ◽  
Solar Thermal ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Heat Pump System ◽  
Ground Source ◽  
Solar Thermal Collectors ◽  
Ground Loop

This thesis presents a study for examining the viability of hybrid ground source heat pump (GSHP) systems that use solar thermal collectors as the supplemental component in heating dominated buildings. Loads for an actual house in the City of Milton near Toronto were estimated. TRNSYS, a system simulation software tool, was used to model the yearly performance of conventional GSHP as well as the proposed hybrid GSHP system. The house was equipped with a data monitoring system which was installed to read and record fluid flow, temperature and electricity consumption in different components of the system. The actual yearly data collected from the site was examined against the simulation results. In addition, a sensitivity analysis was carried out to determine the relationship between the solar collector area and the ground loop heat exchanger (GHX) length. It was shown that the ratio of GHX length reduction to solar panel area of 4.7 m/m This study demonstrates that a hybrid GSHP system, combined with solar thermal collectors, is a feasible choice for space conditioning for heating dominated houses. It was shown that the solar thermal energy storage in the ground could reduce a large amount of ground loop heat exchanger length. Combining three solar thermal collectors with a total area of 6.81m

DETERMINING THE PROFITABILITY OF GREENHOUSE ELECTROTECHNOLOGIES: A MODELING APPROACH

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 249a-249
Author(s):  
Eric A. Lavoie ◽  
Damien de Halleux ◽  
André Gosselin ◽  
Jean-Claude Dufour
Keyword(s):  
Energy Consumption ◽  
Heat Pump ◽  
Water System ◽  
Heat Pumps ◽  
Hot Water ◽  
Pump System ◽  
Heat Pump System ◽  
Artificial Lighting ◽  
Hot Air ◽  
Marketable Fruit

The main objective of this research was to produce a simulated model that permitted the evaluation of operating costs of commercial greenhouse tomato growers with respect to heating methods (hot air, hot water, radiant and heat pumps) and the use of artificial lighting for 1991 and 1992. This research showed that the main factors that negatively influence profitability were energy consumption during cold periods and the price of tomatoes during the summer season. The conventional hot water system consumed less energy than the heat pump system and produced marketable fruit yields similar to those from the heat pump system. The hot water system was generally more profitable in regards to energy consumption and productivity. Moreover, investment costs were less; therefore, this system gives best overall financial savings. As for radiant and hot air systems, their overall financial status falls between that of the hot water system and the heat pump. The radiant system proved to be more energy efficient that the hot air system, but the latter produced a higher marketable fruit yield over the 2-year study.

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.

Experimental Study of Heating-Cooling Combined Ground Source Heat Pump System with Horizontal Ground Heat Exchanger

2011 ◽  
Vol 374-377 ◽  
pp. 398-404 ◽  
Author(s):  
Ying Ning Hu ◽  
Ban Jun Peng ◽  
Shan Shan Hu ◽  
Jun Lin
Keyword(s):  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Pump ◽  
Hot Water ◽  
Coefficient Of Performance ◽  
Ground Heat Exchanger ◽  
Pipe Length ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling

A hot-water and air-conditioning (HWAC) combined ground sourse heat pump(GSHP) system with horizontal ground heat exchanger self-designed and actualized was presented in this paper. The heat transfer performance for the heat exchanger of two different pipe arrangements, three layers and four layers, respectively, was compared. It showed that the heat exchange quantity per pipe length for the pipe arrangement of three layers and four layers are 18.0 W/m and 15.0 W/m. The coefficient of performance (COP) of unit and system could remain 4.8 and 4.2 as GSHP system for heating water, and the COP of heating and cooling combination are up to 8.5 and 7.5, respectively. The power consumption of hot-water in a whole year is 9.0 kwh/t. The economy and feasibility analysis on vertical and horizontal ground heat exchanger were made, which showed that the investment cost per heat exchange quantity of horizontal ground heat exchanger is 51.4% lower than that of the vertical ground heat exchanger, but the occupied area of the former is 7 times larger than the latter's.

Application of an Exhaust Heat Recovery System for Domestic Hot Water

2008 ◽  
Author(s):  
Lanbin Liu ◽  
Lin Fu ◽  
Yi Jiang
Keyword(s):  
Solar Energy ◽  
Heat Pump ◽  
Heat Recovery ◽  
Tap Water ◽  
Hot Water ◽  
Collection System ◽  
Pump System ◽  
Heat Pump System ◽  
Exhaust Heat ◽  
Exhaust Heat Recovery

Typically there is a great deal of waste heat available in drainage system of large-scale public bathhouses, such as public bathhouses in schools, barracks and natatoriums. The paper advances a heat pump system used in bathhouses for exhaust heat recovery. The system consists of solar energy collection system, drainage collection system and heat pump system for exhaust heat recovery. In the system, tap water is heated by energy from solar energy collection system, and is used as hot water for bathing at the beginning. At the same time, drainage collection system collects sewage from bathhouses, and then electric heat pump starts up and recovers the exhaust heat in sewage and heats the tap water. In this way, heat is recycled. Practical operation of the system was introduced, and drainage temperature as well as equipment capacity was optimized based on a practical example. Compared with gas-fired (oil-fired, coal-fired, electric) boilers, the system has advantages of lower energy consumption, less pollution and lower operating cost. Therefore, the system has great superiority in energy conservation and has a good application prospect.

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