Below are the different projects that have been granted funding through EFFSYS+ presented. Each project has a dedicated page with abstract, quarterly status reports togesther with a list of publications.

EP01 Refrigerants with low GWP and cost and energy efficiency optimization of vapor compression systems
This project has two parts with the common goal of contributing to the development of the heat pumps and refrigeration systems of the future, both regarding optimum design, from technical and economical point of view, and regarding the choice of refrigerant. Read more >> (http://effsysplus

EP03 Energy efficiency in shopping malls with an improved indoor climate – phase 2
The project aims to describe, evaluate and compare various alternative system solutions for heating, cooling, ventilation and electricity in shopping malls. Two shopping malls are studied more thoroughly during the project period, one with heat pumps connected to a borehole thermal energy storage and one without heat pumps and storage. Incentives will be suggested to stimulate the selection of the most energy efficient system solution. Read more >> (http://effsysplus

EP05 Analysis of requirements for nearly zero energy buildings for existing buildings
The project will be performed with theoretical calculations of combinations of different heating systems and energy efficient measures for typical existing buildings. The results will show which energy efficient measures in combination with different heating systems that will be needed for new NNE-requirements of existing buildings in different climatic zones. Read more >> (http://effsysplus

EP07 Capacity control in heat pump systems
The aim of this continuation project is to use the models already developed in order to evaluate the annual performance of some of the most recent techniques and strategies for capacity control in heat pump systems. The previous experimental studies on the variable speed heat pump systems will be continued in order to find the loss behavior in the system and also optimum design parameters from both an electrical and thermodynamical point of view. Read more >> (http://effsysplus

EP09 Study on heat transfer, pressure drop and flow behaviour visualization during evaporation in small rectangular channels
The demand for reduction of the amount of refrigerant charge in the heat pump and refrigeration application is nowadays a growing trend. This demand is motivated by several benefits among which are: the reduced environmental impact; reduced cost of the primary material for manufacturing of a smaller heat exchanger with the same or higher efficiency; reduced space requirments; reduced run and maintenance costs etc. The experiments will be carried out for single-channel heat exchangers made of IR-transparent glass and the scope is to collect precise data for heat transfer in these channels. Read more >> (http://effsysplus

EP11 Operation and maintenance of refrigeration and heat pump systems
Systems are normally installed to generate a temperature required by other activities or processes and the owners rarely have in-house competence in refrigeration techniques. It is then taken for granted that the system is well functioning and optimized if this temperature is achieved. The main aim of the project is to move breakdown maintenance into preventive work and keep the systems in operation at best operation efficiency. Read more >> (http://effsysplus

EP13 Magnetocaloric heat pumping technology in home appliances, heat pumps and air conditioners
Magnetic processes have shown during the recent couple of years to be an alternative to the vapour compression cycle. Aside from these processes do not use conventional refrigerants it has been shown that the energy efficiency can be increased with 20% compared to conventional refrigeration. These advantages could outweigh the increased costs related to this technolgy, especially in a future with increasing energy prices and higher government requirements on energy efficiency.
Read more >> (http://effsysplus

EP15 Analysis of requirements for nearly zero energy buildings for existing buildings – part 2
This is a continuation of project EP05 where analyzed theoretical calculations of combinations of different heating systems and energy efficient measures for typical existing buildings in different climatic zones. In this continuation, the converse will be studied; how many energy efficiency measures can be done with certain profitability when profitability requirements and cost of time are allowed to vary. The result is of great importance for decision-makers, construction- and property sector and also for the suggested check-out of requirements that should be done in 2015, as suggested in EPBD part 2.
Read more >> (http://effsysplus

EP17 Heat pump systems for nearly zero energy single and multifamily buildings
The projects aims at the development of concept systems for heat pumps that can utilize different heat sources for the production of domestic hot water, heating and cooling of single and multifamily NNE-houses. The goal is cost effective solutions that can meet the requirement of both the EPBD2 and the RES-directive, as well as other relevant European directives.
Read more >> (http://effsysplus

EP19 Magnetocaloric heat pumping technology in home appliances, heat pumps and air conditioners
Ammonia is an excellent refrigerant which at the moment is used almost exclusively in large systems. In this project the technique for small refrigeration and heat pump systems with ammonia as refrigerant will be demonstrated. Such a system have a good potential for being more energy efficient than HFC systems, as ammonia can be expected to give better heat transfer and good compressor efficiencies. By use of heat exchangers with small internal volume the charge can be kept low so that the risk connected to leakage is eliminated.
Read more >> (http://effsysplus

EP02 Optimization of ground-storage heat pump systems for space conditioning of buildings
Demand for space heating has decreased in the built environment. Many buildings need cooling the daytime but still require heating at night. One efficient solution for these buildings is to use the ground as source, sunk or intermediate storage of heat and to modify the temperature to the required level by means of a heat pump. Compared to district heating and cooling, purchased energy may be reduced substantially. Read more >> (http://effsysplus

EP04 Efficient design of ground source heat pump systems & implications from EFFSYS2 results
The project intends to study and improve the performance on the source side of ground source heat pumps based on earlier results from the EFFSYS2 project. The study is done in close collaboration with heat pump manufacturers, borehole heat exchanger manufacturers, drillers, installers and consultants in the area.
Read more >> (http://effsysplus

EP06 Evaluation of refrigeration and heating systems in supermarkets based on field measurements and modelling
This project investigates the performance of new vapour compression system solutions for heating and refrigerating needs in supermarkets. Focus will be on CO2 trans-critical and cascade solutions, the available solutions in the market will be investigated, suggestions for system modifications and optimization will be made, and new system solutions will be suggested. Read more >> (http://effsysplus

EP08 Energy system with heat pump and solar cells for a high solar fraction
A combination of PV-systems and heat pumps interesting, since they give a higher solar fraction than solar thermal systems. A standard single family house can get a solar fraction of around 40% while a building with passive house standard can get over 60% solar fraction. A system will be constructed in the laboratory for testing purposes and a system will be installed in a domestic house for demonstration. Simulations will be calibrated with experimental measurements and an optimal system design will be suggested. Read more >> (http://effsysplus

EP10 Guideline to ensure the quality of geothermal storages
The aim of the project is to develop a comprehensive guideline to the design of geothermal storages primarily for larger building applications. Such a guideline should ensure the quality of the installation and its function over time. To build up knowledge in this area is of outmost importance for the Swedish heat pump industry, since this represents a very good market potential in terms of extended use of heat pumps. Read more >> (http://effsysplus

EP12 Heat pump water heaters – Alternative solutions for hot water and space heating – part 2
Space heating tends to decrease while the demand on hot water tends to increase. Hence the relative importance of hot water is increasing while water heating drastically reduces the seasonal performance factor of heat pump systems. Results will be used to analyze the pros and cons of alternative system solutions and indicate the possibilities to increase efficiency. The synthesis shall recommend changes to standards and how to handle inputs for energy calculations on heat pump systems for both space heating and hot water. Read more >> (http://effsysplus

EP14 Influence of adsorption corrosion inhibitors and other additives on heat transfer and thermophysical properties of secondary fluids used in indirect refrigeration systems
An alternative to conventional mechanical protective layers is to form the protective film by chemical interactions between the metal and the inhibitor which can improve heat transfer. The aim of this project is to investigate effect of additives on the thermophysical properties of secondary fluids, the effect of corrosion inhibitors creating physical barrier on the heat transfer process and the effect of adsorption corrosion inhibitors on the heat transfer process. Read more >> (http://effsysplus

EP16 Smart Fault Detection and Diagnosis (SFDD) for heat pump system
A Smart Fault Detection and Diagnosis procedure (SFDD) is suggested as the solution to decrease the performance degradation during operation, and reduce the maintenance cost and the number of reported damages. The designed SFDD system will focus not only on the common faults during the heat pump operation, but also analyze the commissioning phase which covers common installation faults, incorrectly sized equipment, control errors, and refrigeration undercharge and overcharge conditions.Read more >> (http://effsysplus

EP18 Methodology for analyze of energy data of heat pump and cooling systems
This projects aims to develop a method for measurements and follow-up based on the builing’s need for heating and cooling and can support the energy optimization of air-conditioning and heat pump systems. Modern measuring and control systems can deliver a lot of data at resonable cost, but the knowledge of how the measured data is interpreted and transformed into useful and useable information to refrigeration technicians and decision makers is poor or in many cases nonexistent. With simple key factors, the variation in a system is studied over time and changes can be identified before the major economic consequences occur. Read more >> (http://effsysplus

EP20 Design of a single family house with heat pump and PV-system with high solar fraction
This project is an extension of the project EP08 (http://effsysplus A combination of PV-systems and heat pumps is interesting, since they give a higher solar fraction than solar thermal systems. A standard single family house can get a solar fraction of around 40% while a building with passive house standard can get over 60% solar fraction. This extension include a system that will be installed in a domestic house for demonstration and evaluation. Read more >> (http://effsysplus

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