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Industrial heat pump for the cooling circuit
Odehnal, Lukáš ; Kudela, Libor (referee) ; Kracík, Petr (advisor)
This thesis deals with the design of an industrial heat pump for the cooling circuit of a thermal power plant. The aim of the thesis is to analyze and optimize different heat pump technologies, especially compressor and absorption heat pumps, and their application to a specific case. The advantages and disadvantages of different working substances and their influence on efficiency and environmental impact are discussed. The chosen working substance for the compressor HP is the refrigerant R152a and for the absorption HP it is the water-lithium bromide solution. The design of the compressor HP consists of two parts, namely the design of an ideal cycle with a resulting heating factor of 3.81 and the subsequent revalidation with a resulting heating factor of 3.18. The revalidation is carried out under the design of the key components, where the resulting power input at the evaporator is 21.18 MW and the power output through the condenser to the CHSS system is 29.5 MW with an electrical input of the compressor of 9.27 MW. The second proposed absorption HP unit discharges 23.2 MW of thermal power to the CHSS system with a heating factor of 1.48 with an input circulating power of 43.37 MW and input power to the evaporator identical to that of the compressor. The absorption HP design also includes the use of a heat recovery heat exchanger, which increases the overall heating factor to 1.6 and reduces the delivered driving power to the cycle to 34.7 MW. The following is a comparison of the proposed HP units with their suitability depending closely on the specific operational options. The resulting cash flow for both options shows positive values, namely 347.1 million CZK for the compressor option and 209.1 million CZK for the absorption variant.
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Modular absorption cycle
Honka, Pavel ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
The thesis is focused on the cooling cycles, namely cycles of absorption. The work is divided into several parts, as problems to be solved. The first part deals with the principles and using refrigeration cycles in practice, their involvement and by comparing the working pairs of substances circulating in the absorption unit. The practical part deals with making a proposal for one-and two-level modular absorption cycle of 6 kW, and the subsequent techno-economic comparison with commonly supplied absorption unit
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Modular absorption cycle
Honka, Pavel ; Pavlů, Jaroslav (referee) ; Pospíšil, Jiří (advisor)
The thesis is focused on the cooling cycles, namely cycles of absorption. The work is divided into several parts, as problems to be solved. The first part deals with the principles and using refrigeration cycles in practice, their involvement and by comparing the working pairs of substances circulating in the absorption unit. The practical part deals with making a proposal for one-and two-level modular absorption cycle of 6 kW, and the subsequent techno-economic comparison with commonly supplied absorption unit
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