tailieunhanh - Evaporation Condensation and Heat transfer Part 7

Tham khảo tài liệu 'evaporation condensation and heat transfer part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 230 Evaporation Condensation and Heat Transfer i N 2 m i 1 mc 1 - 0 i 0 i ƠI i N É m i 2 ic 2 0 0 i Ũ2 6 i Na1 X m i N i5Vmc N 0 i 0 rrỤmc k is the flow extracted from zone k by vents and N the total number of zones. After the setting up of this non linear system its resolution is performed using a variant of the Newton-Raphson under relaxed method . This airflow model has recently been supplemented by a CƠ2 propagation model in bu ildings Calogine 2010 . Humidity transfers For decoupling reasons zones dry temperatures as well as inter zone airflows have been previously calculated. At this calculation step for a given building each zone s specific humidity evolution depends on the matricial equation Bk 7 According to Duforestels mo del an improvement of the hydric model Lucas 2003 was given by the use of a hygroscopic buffer. If we consider N as the number of zones a linear system of dimension 2N is obtained and a finite difference scheme is used for numerical solution. 3. Some elements of CODYRUN validation Inter model comparison A large number of comparisons on specific cases were conducted with various softwares whether CODYBA TRNSYS for thermal part with AIRNET BUS for airflow calculation or even CONTAM ECOTECT and ESP. To verify the correct numerical implementation of models we compared the simulation results of our software with those from other computer codes Soubdhan 1999 . The benchmáĩ for inter-comparison software is the BESTEST procedure Judkoff 1983 Judkoff 1995 . This procedure has been developed within the framework of Annex 21 Task 12 of the Solar Heating and Cooling Program SHC by the International Energy Agency IEA . This tests the software simulation of the thermal behavior of building by simulating various buildings whose complexity grows gradually and comparing the results with other Simula tion codes ESP DOE2 SERI-RES CLIM2000 TRNSYS . . The group s collective experieoe has shown that when a program showed major differences .