⼤岡研究室・菊本研究室Ooka Lab. and Kikumoto Lab.

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Research on Geothermal Energy Systems

Research on Geothermal Energy Systems

Features of geothermal air conditioning system

Yearly ground and air temperatures

Examples of geothermal system equipped buildings

Energy pile systems to reduce high construction costs of ground heat exchangers

Research on geothermal air conditioning system

① Compared to the air, the ground temperature is low in summer and high in winter. Thus, it is more advantageous as a heat source for air conditioning, and highly efficient system operation (high COP) can be achieved.

② By introducing geothermal energy, the amount of fossil fuel used and CO2 emissions can be reduced.

③ Geothermal energy systems do not release the exhaust heat to the atmosphere. Thus, the mitigation of the heat island phenomenon can be expected.

③：U-Tokyo Environmental Building①： Maekawa head office ②： Tokyo Sky Tree

Merits of geo-energy systems

大田区

足立区

練馬区

世田谷区

江東区

江戸川区

葛飾区

杉並区

板橋区

港区

北区

品川区

新宿区

渋谷区

文京区中野区

目黒区

墨田区

豊島区

中央区

荒川区

台東区

千代田区

1970年以前

1970年以降

直接利用可能井戸

Katsushika

Shinagawa

Minato

Shibuya

Chiyoda

Shinjuku

Bunkyo

Toshima

Nakano

Suginami

SetagayaMeguro

Ota

Nerima

ItabashiKita

Adachi

Arakawa

Edogawa

SumidaTaito

Koto

Chuo

Installed before 1970

Installed after 1970

Available well for direct use-10～-20

-2～-9

地下水位（m）

5～-2

0

2

-1

0

-8

0

-18

-10

-7

0

0

-15

0

5

-3

-2

-12

-9

-14-10

-10

-14

-13

大田区

足立区

練馬区

江東区世田谷区

江戸川区

葛飾区

杉並区

板橋区

港区

北区

品川区

新宿区中野区

渋谷区

目黒区

墨田区

豊島区

文京区

中央区

荒川区

台東区

千代田区

Groundwater level (m)

Katsushika

Shinagawa

Minato

Shibuya

Chiyoda

Shinjuku

Bunkyo

Toshima

Nakano

Suginami

Setagaya

Meguro

Ota

Nerima

ItabashiKita

Adachi

Arakawa

EdogawaSumidaTaito

Koto

Chuo

大田区

足立区

練馬区

世田谷区

江東区

江戸川区

葛飾区

杉並区

板橋区

港区

北区

品川区

新宿区

渋谷区

文京区中野区

目黒区

墨田区

豊島区

中央区

荒川区

台東区

千代田区

ストレーナー設置可能位置

-400m以下

-500m以下

-550m以下

-650m以下

＜規制対象＞・吐出口断面積：6~21cm²・21cm²超は設置禁止。・6cm²未満の場合は、ストレーナー位置の規制なし。

Katsushika

Shinagawa

Minato

Shibuya

Chiyoda

Shinjuku

Bunkyo

Toshima

Nakano

Suginami

SetagayaMeguro

Ota

Nerima

ItabashiKita

Adachi

Arakawa

Edogawa

SumidaTaito

Koto

Chuo

Strainer must be installed

<Pumping Regulation>The diameter of pumping pipe is ・6～21㎠→ Allowed with strainer restriction・over 21㎠ → Not allowed・under 6㎠ → No regulation

under 400m

under 500m

under 550m

under 650m

ヒートポンプ

冷暖房

基礎杭

水熱源

①：Energy pile system covers 17% of the cooling load and 31% of the heating load.②：Energy pile system was implemented for heating and cooling of the building③：Entrance space is condi-tioned by geothermal system

Schematic of energy pile systems

Creating a potential map for geothermal energy utilization

Prediction of long-term usage considering heat balance of ground surface

Geothermal potential map of 23 wards of Tokyo

Ground

17℃

Air

Aug Feb

Tem

pera

ture