[en] Issues of progress in energy conservation in industrial sector in Japan and energy conservation through waste heat recovery are discussed. 32 figs, 7 tabs

[en] The present invention provides a hybrid power facility having a high power efficiency without introducing a fluid containing radioactivity directly to an exhausted heat recovering boiler and not releasing it to atmosphere. Namely, a gas turbine power plant is built together with a BWR power plant, and the exhausted heat recovering boiler is connected to the gas turbine. An intermediate loop for connecting a main steam heater and a lower pressure feedwater heater is disposed to a heat transfer tube in the boiler. The heat of the exhausted heat recovering boiler is taken out by using purified water, nitrous acid type molten salt or a liquid metal as an operation fluid of the intermediate loop, and steams at the exit of the reactor are further heated to a high temperature by the heat. Then, since temperature difference as a highly overheated source is increased by thus using the exhausted heat of the gas turbine power plant, the power generation efficiency is improved remarkably. (I.S.)

[en] As a part of the project 'development of hydrogen production technologies by high temperature electrolysis using very high temperature reactor', we have developed an electrolyzer model for high temperature steam electrolysis (HTSE) system and carried out some preliminary estimations on the effects of heat recovery on the HTSE hydrogen production system. To produce massive hydrogen by using nuclear energy, the HTSE process is one of the promising technologies with sulfur-iodine and hybrid sulfur process. The HTSE produces hydrogen through electrochemical reaction within the solid oxide electrolysis cell (SOEC), which is a reverse reaction of solid oxide fuel cell (SOFC). The HTSE system generally operates in the temperature range of 700∼900 .deg. C. Advantages of HTSE hydrogen production are (a) clean hydrogen production from water without carbon oxide emission, (b) synergy effect due to using the current SOFC technology and (c) higher thermal efficiency of system when it is coupled nuclear reactor. Since the HTSE system operates over 700 .deg. C, the use of heat recovery is an important consideration for higher efficiency. In this paper, four different heat recovery configurations for the HTSE system have been investigated and estimated

[en] Description of solid sanitary and technogenic waste reprocessing technology; heat diagram of heat recovery of waste reprocessing process; description of facility operation fundamental modes; requirements to basic systems and materials of facility of technogenic and sanitary industrial waste high-temperature reprocessing; standard-technical documents according to which facility designing, building and operation is conducted are presented in the report. There have been demonstrated the capability for creation of facility of high-temperature sanitary and technogenic waste recovery. There have been selected structure materials with operation lifetime of not less than 10 years at the parameters obtained in the furnace. There have been shown that systems of heat-sink cooling with sodium coolant created in atomic energetic are applicable for heat recovery of melting furnace and outgoing gases in high-temperature sanitary and technogenic waste reprocessing facilities with bubbling flux bath

[en] Our oil explorations both onshore and offshore have thrown open bright prospects of cogeneration by using natural gas in gas turbine power plants with heat recovery units. Both for co-gen and combined cycle systems, supplementary firing of GT exhaust gas is normally required. Hence, duct burners have significant role for effective contribution towards of efficacy of heat recovery system for gas turbine exhaust gas. This article details on various aspects of duct burners in heat recovery systems. (author)

[en] Absorption of low temperature steam in the acid concentrate raises the temperature of diluted acid stream. Heat pump based on this principle, called as acid absorption chemical heat pump (AACHP) is coupled with high energy demanding separation unit like distillation column to reduce the heat requirements. This article highlights the advantages of employing AACHPs. AACHP eliminates the need for sophisticated compressors. AACHP based on acid-water system is described. About 95% of supplied heat to the distillation unit is wasted through the cooling water to the environment, but net saving in heat is found to be approximately 40% if a distillation column is coupled with AACHP.(M.G.B.)

[en] Energy conservation is of vital importance in the industry. This article analyses waste heat recovery systems in the two specific examples of an HTHP dyeing plant and a beer boiler. (author). 2 figs

No abstract available

[en] In this report a graphical method to analyze the direct suspension-cyclon heat exchangers, in multi-stage configuration is presented. Each tube-cyclon stage is regarded as an equilibrium unit. The modification of the graphical method is considered in the case of solid entrained by the current of gas leaving the cyclon, and of gas by-passed in solid feed. The graphical method of analysis is useful to evaluate the operating conditions of the heat exchanger. (Author) 6 ref

[en] A thermoeconomic feasibility analysis is presented yielding a simple algebraic optimization formula for estimating the optimum length of a finned pipe that is used for waste heat recovery. A simple economic optimization method is used in the present study by combining it with an integrated overall heat balance method based on fin effectiveness for calculating the maximum savings from a waste heat recovery system