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Improvement of energy efficiency and environmental safety of thermal energy through the implementation of contact energy exchange processes

Varlamov G. B., Romanova K. A., Nazarova I., Daschenko O., Kapustiansky A.

Archives of Thermodynamics

2017

Vol. 38, no. 4

127–-137

Energy efficiency improvement and ecological safety of heat power plants are urgent problems, which require scientifically grounded approaches and solutions. These problems can be solved partly within the presented heat-and-power cycles by including contact energy exchange equipment in the circuits of existing installations. A significant positive effectis obtained in the contact energy exchange installations, such as gas-steam installation ‘Aquarius’ and the contact hydrogen heat generator that also can use hydrogen as a fuel. In these plants, the efficiency increases approximately by 10–12% in comparison with traditional installations, and the concentration of toxic substances, such as nitrogen oxides and carbon monoxide in flue gas can be reduced to 30 mg/m3 and to 5 mg/m3, respectively. Moreover, the plants additionally ‘generate’ the clean water, which can be used for technical purposes.

Model of electricity and heat generator based on a high temperature fuel cell for residential applications

Bujalski W., Skowroński W.

Journal of Power Technologies

2013

Vol. 93, nr 1

16--26

Increasing electricity requirements in residential sector create a possible market for small cogeneration systems. Such a system can be based on a new and highly efficient technology such as high temperature fuel cells. Mathematical modeling is a low cost and effective method for analyzing possible operation strategies and system economical results. The objective of this paper was to present the simulation results of operation of a micro CHP system based on a SOFC in Polish reality. The model of SOFC based micro-CHP system was developed. Based on this model the technical and economical analysis was performed. The results of sensitivity analysis established a SOFC performance variation with utilities price changes. Moreover, the optimum of a micro-CHP system was found to be 1 kW.