Docstoc

SolarThermalinBuildings

Document Sample
SolarThermalinBuildings Powered By Docstoc
					Asian Workshop on Energy and Environmental Technologies, February 13, 2008
Bureau of Environment, Tokyo Metropolitan Government




         Solar Thermal System in
                Buildings
           - Solar thermal technology -

   Mitsuhiro Udagawa
   Professor
   Department of Architecture
   Kogakuin University
   Tokyo, Japan

   udagawa@cc.kogakuin.ac.jp


                                                                             1




         Solar Thermal Technology
                in Buildings
     Systems
       Hot Water Heating
       Space Heating
       Cooling

     Components
      Solar Collector
      Solar Hot Water Heater

                                                                                 2




                                                                                     1
Development of Solar cooling
                                              (1974)




Total Floor Area 127m2
Collector area: 102m2    Heat storage tank: 5m3
Absorption chiller: 7kW, 75 – 90 degrees C
                                                    (Yazaki, Solar House One)   3




 Solar Collector
 - Flat plate collector -                    熱媒出口
                                             fluid outlet
    Transparent insulation     Glass 透過体
                                     cover
               透明断熱材
    (plastic film)

      集熱板
      Absorber plate




                                                              固定金具 hook
                                                              Mounting

                                            Insulation
                                                断熱材           受熱箱
                                                              Case
                                    熱媒入口
                                    fluid inlet
                            図3.太陽集熱器の構造
                          Super Blue Panel (Yazaki Corp.)
                                                                                4




                                                                                    2
Solar Collector
- Evacuated Tubular Collector -




                Evacuated Tubular Collectors on the top of
                                                                           5
                the Tokyo International Forum




Solar Water Heater




                           Tank 200-300L

                     Collector 4-6m2



                                                 City water

                Cumulative installation:
                      5,000,0000 units
                                                                   Hot water
                 Collector area: 3m2
                 Installation:
                    250,000-300,000Yen                                     6
                                                Auxiliary Boiler




                                                                               3
Solar Hot Water
 Heating system
•Solar collector and Heat Storage tank
•Pump with heat collection control system


Collector 6-8m2




                          Differencial
                          thermostat
                                                                               Heat storage
  Freeze free liquid                                                           tank


                                                                         Hot water


                                               City water


                       Pump                                 Auxiliary Boiler
                                  Tank 300-370L                                               7




   Solar space heating system 1985




                                     USH
                                     (Udagawa1985)


                                                                        Solar floor heating
                                         Collector 12m2
                                                                                              8




                                                                                                  4
USH
Solar floor and DHW heating for single family house
                                                                 T
 Solar contribution                                                       Solar collector
                                                                           1.19 m2 x 6 units : total 11.5 m2
     (1985 – 2004)                                                         Titled angle : 60 degrees

 DHW:            50%
 Space heating: 50%
                                                                                                                     Room air conditioner

                            Pump controller

         Thermometer     Thermometer
                                                                         Surge tank (72 liters)             CB
                              Valve switch
                                                                     T


                                                               DHW supply


 Electric
 DHW
 heater
                                             TW                                                   Solar floor heating
                                                                 Pump                             300 mm thick concrete slab
 460 liters
                                                  C     C        50W x 2
                                                                                   L (17 m2)                D (9 m 2)   S (9 m 2)
  200 V
                                   T         T3
  8.4 kW
                                             T2
                                              TH
    Solar storage tank         Switch valve
     300 liters                                   City water                      C : Calory meter
                                                                                                                                            9




Solar House (Chiryu, Aichi Pref.)




                                                       • Active + Passive Heating
                                                       • Solar collector+floor heating
                                                       and Tromb wall
                                                                                                                                            10
                                                                            (Photo and drawing by Okamoto, Chiryu Heater)




                                                                                                                                                 5
OM Solar System
Integrated solar house with air collector
                             Solar collector
                             (Glass cover)
            Solar collector                           Handling Box
            (w/o Glass cover)




           outdoor air




              hot air
                                floor heating


                                                          DHW tank
                        Concrete slab    hot air                       11
                                                          (OM solar)




Solar PV and Thermal Systems
    Solar PV House appeared (1990s)




    PV system with well insulated house and Solar DHW heating
                                                                       12
    (Housing area near Akita City, Misawa Home Co.)




                                                                            6
Hybrid Solar House




4 collectors + 24 PV modules (Yazaki Co.)                       13




 Solar Hot Water Heating System
 with PV pump
                                            PV module

        Collector 4m2




                                              Water tank 200L




                                            (Yazaki Corp.)      14




                                                                     7
Solar systems for apartment houses
Noborito solar house, 1978
    – Feasibility study by Japan Housing Corporation -




                                                                 15




Solar apartment houses




Chiryu City                          Kanazawa City


- Examples of solar DHW system for multi-family house in 1980s
- Individual system using balcony mounted solar collector
                                                                 16




                                                                      8
Solar space and hot
water heating for a
lowrise apartment
house(Chiryu City)




 (Chiryu heater)                Solar apartment house                17
                                (Chino City, Nagano Pref.)




Large Solar Building
- Senior Center in Shiobara -
                   Health care center for elderly people
                   Solar heating and cooling system (Yazaki, 2003)




                                                                     18




                                                                          9
   - Senior Center in Shiobara -

                                          Solar heating and cooling system
                                            total floor area 610m2
Collector 258m22
                                                                             Aborption chiller

                                                      Cooling tower
                             室内(FC)へ
                          FC units
                                床暖房へ
                          Floor heating
                              HEX


                                                  B

                                                Absorption
                                                温水焚吸収式 chiller
                                                冷温水機70.3kw
                                                70.3kW
                                                  (20RT)
                                                                      Tank for hot spring
            Tankstorage tan                                           water, 30ton
             Heat 7.2ton
                                                 Swimming pool
                                                     温水プール
                                                 60ton 60t




                                                                                               19
                                                                         (Yazaki)




                                                      Fujieda Sunppu
                                                      Hospital
                                                      Solar DHW heating
                                                      system, 2000




Collector
96m2




                                                                          Hot water supply
            Tank 5m3
                                            Hot water tank            Boiler
                                            1.65m3 x 2units           140kW x 2units
                                                                                               20
                                                                                    (Yazaki)




                                                                                                    10
 OM Solar Systems
 - integrated solar house design -




                                                                                      (OM Solar)

                                                                                                         21
 Office building of OM Solar “Egg of Earth”, Hamamatsu, 2004




Solar Desiccant Dehumidification and
Cooling System
(Harunocho Regional Center, Hamamatsu)

                                                                            Dehumidification cooling process

                                                                                   Regeneration process


                                                                                       MD



                                                                                      AHU A        Fan


                                                           Primary                     AHU B
                                                           desiccant

                                                                 Damper



                                                       Cooling coil
                                                                                Secondary
                                                                                desiccant

                                                       Free access floor


                                                                                     Aseismatic
                                                                                    Floor pitpit


                                               Figure 2 Solar desiccant cooling operation in summer

                                                                          (OM solar)                     22




                                                                                                               11
Expected Solar Energy Use in Japan
            (Primary Energy, 106 kL Oil/year)

                             FY2003                 FY2010

 Solar thermal                 0.59                     0.9
                                                      (4.39)
 Solar PV                      0.21                    1.18

 Wind power                    0.28                    1.34
 New energy total              10.54                  19.10
 (Gross energy)               (1.8%)                  (3%)
                                                                     23




Expected Collector Area
Collector Area                         x 106 m2

Existing Area in 2004                       7.7           stock

Expected until 2010                       12.8

Expected installation until 2010                     for 4 years,
                                            1.3
(every year)                                         2007-2010

Installed in 2005*                         0.25

                      *Solar DHW system and Solar Water heater
                                                                     24
                      **Collector Area 1m2 = 0.07kL Equivalent Oil




                                                                          12
Feature of Solar Thermal System

 Solar thermal system vs. PV system
       Solar thermal system
           Heat load: Hot water heating, space heating and
           cooling
           Solar system: Tightly connected with Heat Load
           Heat load influenced by weather condition and
           behavior of the occupants

       PV system
           Electricity, for all purpose
           Grid connected system: sell and buy the electric
           power

                                                                                      25




Example of Energy Requirement
in Buildings in Japan
   Residential House
                        Energy Use in Residential
   46 GJ/family for a year 46GJ/family for yearHouse              Cooling
                                                Cooling           Space heating
                                                       2%         DHW
                            35%                                   Lights+Applinaces
 Lights and Appliances

                                                            28%


                                                              Space Heating


 Hot water Heating
                                      35%


 - Hot water heating and Space heating, Major heat requirements
 - Solar heating to reduce hot water heating energy
 - Building thermal insulation and solar energy to reduce space
                                                                                      26
 heating energy




                                                                                           13
Solar Thermal System for Today,
Tomorrow
 Integration
    Integration with Heat loads and Building service systems
    Integration with Building thermal system and Architectural design

 Standardization
    Standardization of Systems and Components
    Standardization of Design and Evaluation Methods

 Cost effectiveness
   Reduce Installation cost
   Improvement of Pay back period
     Including Finance, Subsidy


                                                                        27




                                                                             14

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:179
posted:1/12/2011
language:English
pages:14