| Abstract [eng] |
Increasing energy efficiency by recovering waste energy is an energy efficient solution. When the amount of waste heat available is insufficient or not hot enough to recover it through heat exchangers, heat pumps are being used to efficiently make use of available waste heat. The aim of this Master Thesis is to investigate waste heat recovery possibilities in cogeneration plant, using heat pumps. Analyzing scientific literature, evaluating technical, economic and environmental aspects, possibilities of application of absorption and compressor heat pumps are analyzed and compered. The economic analysis of investments in heat pumps assessed the impact of different project parameters on investment payback time. This study evaluates eight different investment conditions: the fastest return of investment (in 1.49 years) achieved with compression heat pump operating 8000 hours per year, when project received 30% of invested amount as financial aid. The slowest return of investment (in 10.61 years) observed with absorption heat pump operating 3000 hours per year and acquired without any financial aid. Investment calculations of the expenditure and income balance showed that the profitability of the analyzed heat pumps is mainly influenced by: the amount of investment, the amount of financial aid, natural gas and electricity prices. |
