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Документ Modified Criterion for Economic Efficiency Estimation of Heat Pumps(The Italian Association of Chemical Engineering, 2013) Boldyryev, S.; Garev, A.; Ilunin, О.; Shamraev, Anatolij; Selyakov, О.; Leshchenko, O.; Kapustenko, P. O.In this work the cost-effectiveness of coal mine waste water low potential heat utilization and integration in the enterprise local heating network by the bivalent parallel scheme is investigated. It is shown that the additive criterion of economic efficiency is not always sensitive to the target value because of the reason of non-linear coupling between the arguments of the target function. Several cases were considered from the viewpoint of cost-effectiveness criterion. Moreover, the arguments of the target function are also nonlinear, depending on technological parameters of the heat pump (HP) equipment. As a more effective criteria were proposed the modified canonical additive-multiplicative function and Kolmogorov-Gabor polynomial function to obtain the generalized multivariate estimation of alternatives in two stages procedure.Документ Plate Heat Exchangers for Environmentally Friendly Heat Pumps(The Italian Association of Chemical Engineering, 2007) Tovazhnyanskyy, Leonid Leonidovich ; Sherstyuk, V.; Khavin, G. L.; Perevertaylenko, O. Yu.; Boldyryev, S.; Garev, A.; Kapustenko, P. O.Plate heat exchangers are now widely used in different industrial installations due to their unique characteristics important for process engineering. In recent years the use of plate heat exchangers for heat pumps has significantly increased, including the cases with natural refrigerants such as hydrocarbons, ammonia and carbon dioxide. The typical duties of plate heat exchangers in heat pumps with natural refrigerants are defined and acceptable types of plate heat exchangers for each duty discussed. The advantages of plate heat exchangers are very useful in units coupled with evaporators and condensers. In this case the proper selection of the plate materials taking into account the nature of the source of low potential heat for units coupled with evaporators is required. Proper prediction of fouling factor is also important for units coupled with condenser.