问题 问答题 简答题

简述地源热泵系统的形式。

答案

参考答案:

土-气型地源热泵系统按照室外换热方式不同分,主要有三类形式:

1、地耦管系统

该方案只需在建筑物的周边空地、道路或停车场打一些地耦管孔,室外水系统注满水后形成一个封闭的水循环,利用水的循环和地下土壤换热,将能量在空调室内和地下土壤之间进行转换。故该方案不需要直接抽取地下水,不会对本地区地下水的平衡和地下水的品质造成任何影响,不会受到国家地下水资源政策的限制。

2、地下水系统

项目附近如果有可利用的地表水,水温、水质、水量符合使用要求,则可采用开式地表水(直接抽取)换热方式,即直接抽取地表水,将其通过板式换热器与室内水循环进行隔离换热,可以避免对地表水的污染。此种换热方式可以节省打井的施工费用,室外工程造价较低。

3、地表水系统

项目附近如果有可利用的地表水,水温、水质、水量符合使用要求,则可采用抛放地耦管换热方式,即将盘管放入河水(或湖水)中,盘管与室内循环水换热系统形成闭式系统。该方案不会影响热泵机组的正常使用;另一方面也保证了河水(湖水)的水质不受到任何影响,而且可以大大降低室外换热系统的施工费用。

选择题
完形填空
完形填空。   
     It's never easy to admit (承认)you are in the wrong. We all 1 to know the art of apology ( 道歉). Think how often you've done wrong. Then count how many   2   you've expressed clearly you were 3 . You can't go to bed with an easy mind if you do   4  about it.    
     A doctor friend, Mr. Lied, told me about a man who came to him with different kinds of signs: headaches, heart trouble and insomnia (失眠症).  5  some careful exams, Mr. Lied found nothing wrong with him and said, “If you don't tell me what's 6  you, I can't help you.”    
The man admitted he was cheating (骗取)his brother of his inheritance (遗产). Then and there the clever
doctor   7 the man write to his brother and  8  his money. As soon as the letter was put into the post box,
the man suddenly cried. “Thank you,” he said to the doctor, “I think I've got well.”    
     An apology can not only save a broken relationship (关系), but also make it  9  .If you can think of
someone who should be 10  an apology from you, do something about it right now.
( )1. A. decide
( )2. A. mistakes
( )3. A. sorry
( )4. A. something
( )5. A. Before
( )6. A. hurting
( )7. A. made
( )8. A. gave
( )9. A. newer
( )10.A. received

B. have
B. people
B. weak
B. anything
B. After
B. changing
B. helped
B. kept
B. worse
B. give

C. need
C. ways
C. sad
C. nothing
C. Till
C. touching
C. let
C. returned
C. harder
C. known

D. try        
D. times      
D. wrong      
D. everything  
D. Since      
D. worrying    
D. saw        
D. paid        
D. stronger    
D. forgotten