- (2) Heat-using facilities
- Enterprises shall strive to recover heat efficiently to achieve a target of reducing the inlet temperature of coolers and capacitors to below 200°C. This shall not apply to equipment using a solid, extremely dirty fluid or highly corrosive fluid and having a cooling and heating value of under 2,100 MJ per hour or heat recovery capacity of under 630 MJ per hour.
- If steam is used by facilities for heating, etc., and action is taken to streamline energy use by increasing dryness, consideration shall be given to increasing the dryness of heat-using facilities through the introduction of equipment to prevent radiation at the transport stage and steam separators.
- Consideration shall be given to increasing the mission of furnace walls and other parts of industrial furnaces by improving their properties and shape.
- Consideration shall be given to increasing the heat transfer coefficient of the heat transfer area of facilities for heating, etc., by improving the properties and shape.
- Consideration shall be given to the use of materials with a high coefficient of thermal conductivity for parts of heating facilities, etc., used in heat exchange.
- Consideration shall be given to reducing the heat capacity of the furnace casing of industrial furnaces, firing bases, fixtures, and carts for transporting heated substances and similar equipment.
- If direct heating of heated objects by direct flame burners or submerged combustion, etc. is possible, direct heating shall be considered.
- For heating, etc. by multieffect evaporator, consideration shall be given to increasing the overall thermal efficiency by increasing the number of evaporators.
- For distillation towers, consideration shall be given for optimizing operating pressure, reducing the reflux ratio through such means as multistaging of the number of towers, recompressing steam, and introducing multieffect distillation.
- Consideration shall be given to increasing overall thermal efficiency by increasing the number of heat exchangers used and improving their arrangement.
- Consideration shall be given to using heat at multiple stages and improving overall thermal efficiency by combining use of industrial furnaces used at high temperatures and industrial furnaces used at low temperatures.
- Those doing so shall effectively use heat by improving control of heating facilities, etc.
- Consideration shall be given to combining into a series, integrating, shortening, and partially omitting processes requiring repetition of heating, etc.
- Those doing so shall increase the insulation efficiency of furnace walls to achieve the target external furnace wall temperature specified in Attachment Table 3 (B) for industrial furnaces. For intermittently operating furnaces and industrial furnaces operated for not more than 12 hours per day whose internal temperature is at least 500°C, the external furnace wall temperature specified in Attachment Table 3 (B) must be achieved or at least 80% of the area of the furnace wall interior must consist of insulating material with a weighted average powder density of not more than 0.70.
- Consideration shall be given to increasing the insulation efficiency of heat-using facilities by such as means as increasing the thickness of insulation materials, using insulation materials with a low coefficient of thermal conductivity, and using double insulation.
- For the apertures of heat-using facilities, consideration shall be given to preventing heat loss caused by diffusion and inflow and outflow of air by reduction or sealing of apertures, installing double doors, and blockage of air flows from the interior.
- Consideration shall be given to taking measures to prevent leakage of heat media by, for example, applying seals to revolving parts and joint sections of heat-using facilities.
- Consideration shall be given to reducing the radiation area by streamlining the routing of pipes for transporting heat media.
- Consideration shall be given to reducing heat loss due to radiation or diffusion of heat media by covering facilities such as open steam-using facilities and open equipment for transporting high-temperature materials. This shall not apply if air-cooling during transport is required.
- For recovering and using waste heat from exhaust gas, those doing so shall minimize the temperature of waste gas and increase the waste-heat recovery rate to meet the target exhaust gas temperature and waste-heat recovery rate specified in Attachment Table 2 (B).
- If action to streamline energy use through prior removal of water content, preheating, precrushing and other pretreatment of heated materials is possible, an investigation shall be made of preliminary treatment.
- If installing heat-using facilities such as boilers and refrigerators action is to be taken to streamline energy use by reducing the size and dispersing installation of facilities or installing thermal storage facilities, consideration shall be given to doing so.
- For installing boilers, industrial furnaces and heating and drying facilities using heat media such as steam and heated water, facilities shall be used which offer high thermal efficiency in light of the temperature level used, and consideration shall be given to using facilities in line with required capacity based on the operating features and operating status of facilities taking into consideration their features and type.
- For installing heating facilities using hot water as a medium, consideration shall be given to heating by steam vacuum media.
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