Solar Air-conditioning System Using Single-Double Effect Combined Absorption Chiller
Hajime Yabase, Kawasaki Thermal Engineering Co., Ltd. [email protected] Kiyoshi Saito, Waseda University [email protected] Muhammad Idrus Alhamid, University of Indonesia [email protected]
1.Solar System
The efficiency of Solar Thermal is better than that of Photovoltaic.
Efficiency of Solar Energy
Photovoltaic : 10% Solar Thermal : 40% < (in case of utilizing Hot Water)
From HP of NEDO http://app2.infoc.nedo.go.jp/kaisetsu/neg/neg02/index.html#elmtop 2. What’s Absorption Chillers?
Cooling tower ☆Special Feature
Cooling water ① Freon-Free air conditioning machine (Refrigerant = Water ) ② Much less power consumption than electric chiller.
Air Handling ③ Various Energy Sources can be Unit Chilled Absorption (AHU) water Chiller utilized. 3 2. What’s Absorption Chillers? Energy Use Composition in Buildings in Japan
Elevator For Air Conditioning: 43% Water Supply & Machinery Drainage Others Air Conditioning
Ventilation Water Transport
Hot Water
Electric Device Air Lighting Transport
By HP of The Energy Conservation Center, Japan
3. Solar Cooling Applications Conventional System Cooling tower From NEDO/HP
Collector
Cool wind Storage tank
Back-up Chilled water Boiler Absorption chiller 1. Complicated system with a boiler for the back-up of hot water supply 2. Complicated control system to adjust hot water supply in accordance with the fluctuation of load and solar heat Low
5 3. efficiency of absorption chiller(single effect) 3. Solar Cooling Applications
Improveent System
Absorption Chiller(Combined) Single & Double Effect
1. Absorption chiller has a back-up system and no boiler 2. Absorption chiller is automatically moved to combustion for the stable supply 3. of chilled water High 6 efficiency of absorption chiller (Double Effect) 3. Solar Cooling Applications
Solar Cooling System at our Shiga factory
Solar Heat Collector (evacuated tube type)
Air conditioning for this office
Solar Hybrid Chiller 3. Solar Cooling Applications Evaluation status and results in Shiga (1)
thermal energy collection (kW) heating output (kW) cooling output (kW) solar radiation (W/㎡) 200 1000 800 150 600
100 kW
20th May 400 W/m2 50 200 Max temp : 28.4ºC , 0 0 (hour) air-conditioning loading 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 factor :23% gas input (kW) thermal energy use (kW) solar thermal (℃) outside (℃) 250 100 hot water obtained from the solar energy collector 200 75℃ 80 60℃
is used at 60~83℃ 150 60 ℃ kW 100 40 Enabled gas amount to be reduced by 25% 50 20 0 0 (hour) 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3. Solar Cooling Applications Evaluation status and results in Shiga (2)
thermal energy collection (kW) heating output (kW) cooling output (kW) solar radiation (W/㎡) 500 1200 400 1000 800 300
600 kW
200 W/m2 400 28th July 100 200 0 0 Max temp : 34.5ºC , 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 (hour) air-conditioning loading gas input (kW) thermal energy use (kW) factor :60% solar thermal (℃) outside (℃) 500 100
400 75℃ 80 hot water obtained from 60℃
the solar energy collector 300 60 ℃ is used at 60~75℃ kW 200 40 100 20 Enabled gas amount to be 0 0 reduced by 11% (hour) 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3. Solar Cooling Applications
Solar Cooling System in University of Indonesia (UI) is started from Jan. 2014 “Entrusted business on the technical cooperation for co-benefit type solar- aided air-conditioning system in Indonesia during the fiscal years 2013.” sponsored by Ministry of Environment Japan. This project includes detail designing of a solar cooling absorption chiller system utilizing solar energy with the prospect that the system prevails and expands in Indonesia, and includes studying measures for growth of the system in Indonesia by holding a local workshop and a year-end progress meeting.
Cooling Hot water tank New Building of University of Indonesia Solar heat collector Hybrid chiller Fuel Office 3. Solar Cooling Applications Verification of the effect relating to verification test of a solar cooling absorption chiller system utilizing solar energy in UI (1) Comparison equipment specification
Comparison between solar absorption chiller and conventional chiller【RP basis】