1 thermodynam law, by harnessing temperature controlling system (a temperature predicting and controlling software ) which is developed in construction practice in conjunction with the application of center limited difference equation, and through simulating display of inner temperature of massive concrete before construction, select reasonable temperature controlling measurements for massive concrete.
It analyses the reason of producing cracks in concrete. Combined with practical project,it introduces temperature controlling measures of concretes' cracks in large cubage from four aspects——choice of materials,control of construction skills,maintenance of concrete and ways of thermosing,so as to ensure the constructing quality of concrete.
Through observing construction cites and reading works on concrete, this paper analyzes the reasons of concrete crack,explores the methods of temperature controlling and measures of preventing concrete from cracking.
Average strengths in tension of 2.75×109 N/m2 (400×103 lb f/in.2) are reported using this temperature controlling method compared with 2.5×109 N/m2 (360×103 lb f/in.2) for similar diameter material grown using a constant power mode system.
A melt temperature controlling device, dependent on the infra-red emitted from the melt area at which the filament is withdrawn, was developed and used to grow filament of constant diameter in the growth rate range 2.5 to 7.5 cm/min.
In the developed model, the optimization module of the water distribution of secondary cooling zone was established according to the metallurgical criterion for billet and target temperature controlling principle.
In order to achieve that some modifications on temperature controlling and measunng systems have been introduced.
The paper discusses the water temperature controlling system for bathhouse and recommends a better one.It can not only supply for people's demand but also save more water and energy.
To solve the problems such as waste in heating energy and the difficulties of tariff collection, this paper points out the necessity of household measurement for heating system. Related design principle concerning with separated heating meters in newlytemperature controlling are recommended. A proposal for renovation of existing singlepipe heating system is presented.