Prevailing ambient wind is the main reason thatcauses inlet flow rate(air mass flow rate)decreasingand air flowing backward to the air-cooled condenserfans upward to the wind,hence a set of wind guidingnets is designe...Prevailing ambient wind is the main reason thatcauses inlet flow rate(air mass flow rate)decreasingand air flowing backward to the air-cooled condenserfans upward to the wind,hence a set of wind guidingnets is designed to improve the detrimental effect.Fig.1 shows four typical units of a 1000MW directair-cooled condenser(DACC)and a set of windguiding nets installed under its edge upward to theambient wind.As shown in Fig.2,the fan inlet flowrate decreases as the prevailing ambient wind velocityincreasing,especially for the first two units upward tothe wind.展开更多
In order to evaluate the heating performance of gas engine heat pump（GEHP） for air-conditioning and hot water supply, a test facility was developed and experiments were performed over a wide range of engine speed（1...In order to evaluate the heating performance of gas engine heat pump（GEHP） for air-conditioning and hot water supply, a test facility was developed and experiments were performed over a wide range of engine speed（1400-2600 r/min）, ambient air temperature（2.4-17.8 ℃） and condenser water inlet temperature（30-50℃）. The results show that as engine speed increases from 1400 r/min to 2600 r/min, the total heating capacity and energy consumption increase by about 30% and 89%, respectively; while the heat pump coefficient of performance（COP） and system primary energy ratio（PER） decrease by 44% and 31%, respectively. With the increase of ambient air temperature from 2.4 ℃ to 17.8 ℃, the heat pump COP and system PER increase by 32% and 19%, respectively. Moreover, the heat pump COP and system PER decrease by 27% and 15%, respectively, when the condenser water inlet temperature changes from 30 ℃ to 50 ℃. So, it is obvious that the effect of engine speed on the performance is more significant than the effects of ambient air temperature and condenser water inlet temperature.展开更多
文摘Prevailing ambient wind is the main reason thatcauses inlet flow rate(air mass flow rate)decreasingand air flowing backward to the air-cooled condenserfans upward to the wind,hence a set of wind guidingnets is designed to improve the detrimental effect.Fig.1 shows four typical units of a 1000MW directair-cooled condenser(DACC)and a set of windguiding nets installed under its edge upward to theambient wind.As shown in Fig.2,the fan inlet flowrate decreases as the prevailing ambient wind velocityincreasing,especially for the first two units upward tothe wind.
基金Project(hx2013-87)supported by the Qingdao Economic and Technology Development Zone Haier Water-Heater Co.Ltd.,China
文摘In order to evaluate the heating performance of gas engine heat pump（GEHP） for air-conditioning and hot water supply, a test facility was developed and experiments were performed over a wide range of engine speed（1400-2600 r/min）, ambient air temperature（2.4-17.8 ℃） and condenser water inlet temperature（30-50℃）. The results show that as engine speed increases from 1400 r/min to 2600 r/min, the total heating capacity and energy consumption increase by about 30% and 89%, respectively; while the heat pump coefficient of performance（COP） and system primary energy ratio（PER） decrease by 44% and 31%, respectively. With the increase of ambient air temperature from 2.4 ℃ to 17.8 ℃, the heat pump COP and system PER increase by 32% and 19%, respectively. Moreover, the heat pump COP and system PER decrease by 27% and 15%, respectively, when the condenser water inlet temperature changes from 30 ℃ to 50 ℃. So, it is obvious that the effect of engine speed on the performance is more significant than the effects of ambient air temperature and condenser water inlet temperature.
