On the application of a membrane air—liquid contactor for air dehumidification

This paper deals with a new approach to absorption air-handling systems working with liquid desiccants. A hydrophobic synthetic membrane, permeable to vapour but not to liquid, acts as a porous barrier between a hygroscopic solution and moist air. The results of a first series of experiments performed on a microfibre polyethylene membrane are presented and discussed in relation to an analytical model developed to analyse non-isothermal vapour flux through a hydrophobic membrane. Theoretical analysis is carried out to study the influence of different parameters affecting vapour mass flux through the membrane. The results show that considerable vapour flux can be exchanged to/from a liquid desiccant and an air stream through the membrane, suggesting the feasibility of using compact-membrane absorber and desorber units in air handling. Furthermore, membrane contactors can achieve energy saving by performing desiccant reactivation at moderate temperatures (310–330 K).     

On the Establishment of an Effective Financing System for Housing

ＯｎｔｈｅＥｓｔａｂｌｉｓｈｍｅｎｔｏｆａｎＥｆｆｅｃｔｉｖｅＦｉｎａｎｃｉｎｇ　ＳｙｓｔｅｍｆｏｒＨｏｕｓｉｎｇ（ＴｈｅＲｅｓｅａｒｃｈＧｒｏｕｐｏｎＨｏｕｓｉｎｇＲｅｆｏｒｍ．ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｏｃｉａｌＳｃｉｅｎｃｅｓ）Ｓｉｎｃ...     

On the Regionization of the Industrial Policy

Combining theory withpractice,this article expounded theintrinsic links between the industrialpolicy and the policy ofregionization and the necessity of du-al guides and restrictions for the con-duct of regional main body;the or-ganic combination of the unificationand principle of the persistency ofthe country's industrial policy as a     

Greeting the New Century——On the Academic Development of Urban Planning in China

This is the speech given by Professor Wu Liangyong,Director of the UrbanPlanning Society of China,at the 1993's annual meeting of the Urban Planning So-ciety of China held in Xiangfan,on November 8,1993. In the light of the course of the academic development of China's urban plan-ning,while looking back on the history after World War Ⅱ and taking internationalexperiences for reference,the author analyses the problems which now exist in theplanning of our country and proposes how the functions,contents and methods ofthe work of urban planning meet the needs of the socialist market economy.He al-so makes theoretical elaboration on the principles upheld and the orientation andobjective of academic development in the work of urban planning.He lays stress onthe importance of the accomplishment of the ideological and moral quality for theurban planners under the new situation.     

On the Statistical Index System for Towns

ＯｎｔｈｅＳｔａｔｉｓｔｉｃａｌＩｎｄｅｘＳｙｓｔｅｍｆｏｒＴｏｗｎｓ￥ＺｈｏｕＹｉｘｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＵｒｂａｎａｎｄＥｎｖｉｒｏｎｍｅｎａｌＳｃｉｅｎｃｅｓ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙ．１．ＳｏｍｅＱｕｅｓｔｉｏｎｓｌ．ｌＣ...     

On the Migration of the Surplus RuralLabour Force

ＯｎｔｈｅＭｉｇｒａｔｉｏｎｏｆｔｈｅＳｕｒｐｌｕｓＲｕｒａｌＬａｂｏｕｒＦｏｒｃｅ￥ＬｉＯｉｎｇ（ＤｏｃｔｏｒａｌＳｔｕｄｅｎｔ，ＩｎｓｔｉｔｕｔｅｏｆＲｅｇｉｏｎａｌＥｃｏｎｏｍｉｃｓ，ＲｅｎｍｉｎＵｎｉｖｅｒｓｉｔｙｏｆＣｈｉｎａ）Ａｂｓｔｒａ...     

On the heating potential of buried pipes techniques — application in Ireland

The heating potential of a single earth-to-air heat exchanger as well as of a multiple parallel earth tubes system has been investigated in this paper using real climatic data. The heating system consists of a single tube or multiple parallel tubes, buried in the ground, through which ambient air is propelled and heated by the bulk temperature of the natural ground. The dynamic thermal performance of the system during the winter period and its operational limits have been calculated in Ireland using an accurate numerical model. For this reason multi-year ambient air and soil climatic measurements for the city of Dublin have been used as inputs to the model. Furthermore, an extensive sensitivity investigation was carried out in order to evaluate the effect of the main design parameters on the system's heating capacity. The key variables influencing the performance of earth-to-air heat exchangers were considered to be pipe length, pipe radius, air velocity inside the tube and pipe depth below the surface of the earth. Cumulative frequency distributions of the air temperature at the pipe's exit have been developed as a function of all the input parameters.     

On the Industrialication of Geographic Information System

ＯｎｔｈｅＩｎｄｕｓｔｒｉａｌｉｚａｔｉｏｎｏｆＧｅｏｇｒａｐｈｉｃＩｎｆｏｒｍａｔｉｏｎＳｙｓｔｅｍＡｎｔｈｏｎｙＧａｒ－ＯｎＹｅｈ；ＨｅＪｉａｎｂａｎｇａｎｄＳｈｉＸｕｎＡＢＳＴＲＡＣＴＴｈｅａｒｔｉｃｌｅｇｉｖｅｓｓｏｍｅｃｏｎｓｉｄｅｒａｔｉ...     

On the Special Features of a City

1 .The Aesthetie Charaeteris-ties of a City Eaeh entity Possesses its unique eharae-teristies,and its Peeuliarities in its aPPear-anee whieh can easily lead to its reeognitionand dil'f七rentiation from others;the term,'featurel' 15 frequently used to refer to suchpercePtible eharacteristi