Solar-Assisted Heat Pump Systems: A Review of Existing Studies and Their Applicability to the Canadian Residential Sector

2013 ◽  
Author(s):  
Jenny Chu ◽  
Cynthia A. Cruickshank
Keyword(s):  
Heat Pump ◽  
Residential Buildings ◽  
International Energy Agency ◽  
Heat Pumps ◽  
Hot Water ◽  
Performance Criteria ◽  
Space Heating ◽  
Residential Sector ◽  
Heating And Cooling ◽  
System Configurations

Heat pumps are commonly used for space-heating and cooling requirements. The combination of solar thermal and heat pump systems as a single solar-assisted heat pump (SAHP) system is a promising technology for offsetting domestic hot water, space-heating and cooling loads more efficiently. Task 44 of the Solar Heating and Cooling Programme of the International Energy Agency is currently investigating ways to optimize SAHP systems for residential use. This paper presents a review of past and current work conducted on SAHP systems. Specifically, the key performance data from many studies are highlighted and different system configurations are compared in order to establish insight towards which system configurations are suitable for the Canadian residential sector. It was found that the most suitable configuration for Canadian residential buildings depend on a combination of factors which may include occupant behavior, building characteristics, operation parameters, system components, the performance criteria of interest and climate. A large variety of configurations and parameters exist for SAHP systems and this made analyzing a specific system, comparing differing systems and establishing an optimal design fairly difficult. It was found that different authors used various different performance criterions and this inconsistency also added to the difficulty of comparing the studies of different systems. Overall, a standard performance criterion needs to be established for SAHP systems in order to meaningfully compare different configurations and determine optimal configurations for certain requirements.

Solar-Assisted Heat Pump Systems: A Review of Existing Studies and Their Applicability to the Canadian Residential Sector

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Jenny Chu ◽  
Cynthia A. Cruickshank
Keyword(s):  
Heat Pump ◽  
Residential Buildings ◽  
International Energy Agency ◽  
Heat Pumps ◽  
Hot Water ◽  
Specific System ◽  
Energy Agency ◽  
Residential Sector ◽  
Heating And Cooling ◽  
System Configurations

Combining solar thermal collectors and heat pumps into a single solar-assisted heat pump (SAHP) system is a promising technology for offsetting domestic hot water (DHW), space-heating, and cooling loads more efficiently. Task 44 of the Solar Heating and Cooling (SHC) Programme of the International Energy Agency (IEA) is currently investigating ways to optimize solar and heat pump systems for residential use. This paper presents a review of past and current work conducted on SAHP systems. Specifically, the key performance data from many studies are highlighted and different system configurations are compared in order to establish insight toward which system configurations are suitable for the Canadian residential sector. It was found that the most suitable configuration for Canadian residential buildings depends on a combination of factors which include occupant behavior, building characteristics, operation parameters, system components, and climate. A large variety of configurations and parameters exist and this made analyzing a specific system, comparing differing systems and establishing an optimal design difficult. It was found that different authors used different performance criterion and this inconsistency also added to the difficulty of comparing the studies of different systems.

scholarly journals Experimental Study and Modeling of Ground-Source Heat Pumps with Combi-Storage in Buildings

2018 ◽  
Author(s):  
Wessam El-Baz ◽  
Peter Tzscheutschler ◽  
Ulrich Wagner
Keyword(s):  
Heat Pump ◽  
Water Consumption ◽  
Residential Buildings ◽  
Heat Pumps ◽  
Hot Water ◽  
Space Heating ◽  
Ground Source Heat Pumps ◽  
Domestic Hot Water ◽  
Ground Source ◽  
And Control

There is a continuous growth of heat pump installations in residential buildings in Germany. The heat pumps were not only used for space heating and domestic hot water consumption but also to offer flexibility to the grid. the high coefficient of performance and the low cost of heat storages made the heat pumps an optimal candidate for the power to heat applications. Thus, several questions are raised about the optimal integration and control of the heat pump system with buffer storages to maximize its operation efficiency and minimize the operation costs. In this paper, an experimental investigation is performed to study the performance of a ground source heat pump (GSHP) with a combi-storage under several configurations and control factors. The experiments were performed on an innovative modular testbed that is capable of emulating a ground source to provide the heat pump with different temperature levels at different times of the day. Moreover, it can emulate the different building loads such as the space heating load and the domestic hot water consumption in real-time. The data gathered from the testbed and different experimental studies were used to develop a simulation model based on Modelica that can accurately simulate the dynamics of a GSHP in a building. The model was validated based on different metrics. Energetically, the difference between the developed model and the measured values was only 3.08\% and 4.18\% for the heat generation and electricity consumption, respectively.

Architecture Design of Building Integrated Solar Collector

2014 ◽  
Vol 889-890 ◽  
pp. 1333-1336
Author(s):  
Yu Fu ◽  
Kai Chen ◽  
Fei Ying Fu ◽  
Xin Bin Wang
Keyword(s):  
Water Supply ◽  
Solar Collector ◽  
Residential Buildings ◽  
Radiation Energy ◽  
Hot Water ◽  
Space Heating ◽  
Solar Collectors ◽  
Domestic Hot Water ◽  
Heating And Cooling ◽  
Hot Water Supply

Solar thermal collector converts solar radiation energy into useful thermal energy and transfers to a transport fluid flowing through the system. The collected energy can be used either direct to space or water heating equipment, or to a thermal storage for later use. Along with fast development, not only domestic hot water supply is needed, but also space heating and cooling are required. Also, limited roof space is another key barrier that should be considered. Furthermore, most of the building integration with solar collectors are mounted on the roof top by flat or tilt angle at present. It is considered to be a failure of low level architectural quality because the collector is used only for application and seems as an independent technical element of the building. With the consideration of the above, novel type of solar collector has been proposed to realize the utilization and offset the barriers. This novel solar collectors is especially suitable to supply domestic hot water, and combines with ASHP for multi-function, space heating and cooling as well as domestic hot water supply. Additionally, it is well integrated with high-rise residential buildings, which is good for aesthetic.

scholarly journals A European Database of Building Energy Profiles to Support the Design of Ground Source Heat Pumps

Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2496 ◽  
Author(s):  
Laura Carnieletto ◽  
Borja Badenes ◽  
Marco Belliardi ◽  
Adriana Bernardi ◽  
Samantha Graci ◽  
...  
Keyword(s):  
Heat Pump ◽  
Energy Demand ◽  
Residential Buildings ◽  
Building Energy ◽  
Heat Pumps ◽  
Climatic Conditions ◽  
Ground Source Heat Pumps ◽  
Heating And Cooling ◽  
Energy Profiles ◽  
Ground Source

The design of ground source heat pumps is a fundamental step to ensure the high energy efficiency of heat pump systems throughout their operating years. To enhance the diffusion of ground source heat pump systems, two different tools are developed in the H2020 research project named, “Cheap GSHPs”: A design tool and a decision support system. In both cases, the energy demand of the buildings may not be calculated by the user. The main input data, to evaluate the size of the borehole heat exchangers, is the building energy demand. This paper presents a methodology to correlate energy demand, building typologies, and climatic conditions for different types of residential buildings. Rather than envelope properties, three insulation levels have been considered in different climatic conditions to set up a database of energy profiles. Analyzing European climatic test reference years, 23 locations have been considered. For each location, the overall energy and the mean hourly monthly energy profiles for heating and cooling have been calculated. Pre-calculated profiles are needed to size generation systems and, in particular, ground source heat pumps. For this reason, correlations based on the degree days for heating and cooling demand have been found in order to generalize the results for different buildings. These correlations depend on the Köppen–Geiger climate scale.

Simulation Study on Solar Collector - Air Source Heat Pump Combined System for Space Heating in Cold Region

2012 ◽  
Vol 238 ◽  
pp. 478-481
Author(s):  
Zhen Qing Wang ◽  
Yan Chen ◽  
Hai Xia Wang
Keyword(s):  
Heat Pump ◽  
Simulation Study ◽  
Hot Water ◽  
Office Building ◽  
Space Heating ◽  
Combined System ◽  
Pump System ◽  
Heat Pump System ◽  
Heating And Cooling ◽  
Air Source Heat Pump

An air source heat pump system (ASHPS) was set up, which provided space heating and cooling, as well as hot water for an office building in Tianjin. Its operating performance in winter was evaluated based on test data. Considering the local abundant solar radiation and the way to provide energy in an office building, a simulation study was carried out on the combsystem of ASHP and flat plate air collector (FPAC). The effects of collector area and its outlet parameters on the heating performance of ASHP were studied, and the favorable operating and matching mode were recommended. The results indicate that ASHPS is a technically viable method in Tianjin in winter, but not economically, and the air-solar combsystem should be taken into account for its massive replacement for conventional energy.

Theoretical Comparison of Solar Water/Space-Heating Combi Systems and Stratification Design Options

2007 ◽  
Vol 129 (4) ◽  
pp. 438-448 ◽  
Author(s):  
E. Andersen ◽  
S. Furbo
Keyword(s):  
Thermal Performance ◽  
International Energy Agency ◽  
Heating System ◽  
System Size ◽  
Hot Water ◽  
Weather Data ◽  
Space Heating ◽  
Energy Agency ◽  
Operation Conditions ◽  
Heating And Cooling

A theoretical analysis of differently designed solar combi systems is performed with weather data from the Danish Design Reference Year (55 deg N). Three solar combi system designs found on the market are investigated. The investigation focuses on the influence of stratification on the thermal performance under different operation conditions with different domestic hot water and space heating demands. The solar combi systems are initially equipped with heat exchanger spirals and direct inlets to the tank. A step-by-step investigation is performed demonstrating the influence on the thermal performance of using inlet stratification pipes at the different inlets. Also, how the design of the space heating system, the control system of the solar collectors, and the system size influence the thermal performance of solar combi systems are investigated. The work is carried out within the Solar Heating and Cooling Programme of the International Energy Agency (IEA SHC), Task 32.

Scroll Compressors for Heat Pumps: Application to Space Heating in New and Existing Residential Buildings

2004 ◽  
Author(s):  
Norbert Ka¨mmer
Keyword(s):  
Heat Pump ◽  
Energy Savings ◽  
Residential Buildings ◽  
Heat Pumps ◽  
Performance Comparison ◽  
Space Heating ◽  
Operational Parameters ◽  
Operational Conditions ◽  
Residential Space ◽  
Wide Operating

Heat pumps for residential space heating has become an increasingly important alternative to the conventional European heating systems like gas or oil burners. They offer the opportunity to reduce CO2 emission associated with heating residential homes in central and northern Europe as well as energy savings. The operational parameters for compressors in heat pumps are derived from different heat pump configurations. High compressor efficiency and a wide operating map is required so that an economically viable heat pump is achieved which meets the required operational conditions. The modifications to the basic refrigeration scroll compressor design are demonstrated. These dedicated compressor designs make it possible to achieve the required high condensing temperatures. A performance comparison with the standard compressor designs is presented and the available product range for the design of heat pump systems is shown.

scholarly journals Modeling and Simulation Performance Evaluation of a Proposed Calorimeter for Testing a Heat Pump System

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4589 ◽  
Author(s):  
Amoabeng ◽  
Lee ◽  
Choi
Keyword(s):  
Energy Consumption ◽  
Modeling And Simulation ◽  
Heat Pump ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Test Chamber ◽  
High Energy ◽  
Heat Pumps ◽  
Pump System ◽  
Heating And Cooling

The energy consumption for heating and cooling in the building sector accounts for more than one-third of total energy used worldwide. In view of that, it is important to develop energy efficient cooling and heating systems in order to conserve energy in buildings as well as reduce greenhouse gas emissions. In both commercial and residential buildings, the heat pump has been adopted as an energy efficient technology for space heating and cooling purposes as compared to conventional air conditioning systems. However, heat pumps undergo standard testing, rating, and certification procedures to ascertain their system performance. Essentially, the calorimeter for testing heat pumps has two test chambers to serve as a heat source and heat sink to control and maintain the test conditions required to simulate the heat pump indoor and outdoor units, simultaneously. In air-to-air heat pump units, the conventional calorimeter controls the air temperature and humidity conditions in each test chamber with separate air handling units consisting of a refrigerator, heater, humidifier, and supply fan, which results in high energy consumption. In this study, using dynamic modeling and simulation, a new calorimeter for controlling air conditions in each test chamber is proposed. The performance analysis based on simulation results showed that the newly proposed calorimeter predicted at least 43% energy savings with the use of a heat recovery unit and small refrigerator capacity as compared to the conventional calorimeter that utilized a large refrigerator capacity for all the weather conditions and load capacities that we investigated.

Mine water as a resource: space heating and cooling via use of heat pumps

2003 ◽  
Vol 11 (2) ◽  
pp. 191-198 ◽  
Author(s):  
David Banks ◽  
Helge Skarphagen ◽  
Robin Wiltshire ◽  
Chris Jessop
Keyword(s):  
Mine Water ◽  
Heat Pumps ◽  
Space Heating ◽  
Heating And Cooling ◽  
Resource Space
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