Building Renewable Energy Equipment Introduction Study Manual

This manual, Niseko Town when to build a new building in the, when asked to introduce the facilities for the use of renewable energy such as solar and geothermal heat, as a reference for advancing the study smoothly It was formulated.

 

◆ Countermeasures against cold and temperature differences
Niseko Town is also characterized by seasonal temperature fluctuations, large daily temperature fluctuations, and long periods of heating. In order to reduce the amount of energy used for heating and to realize a comfortable indoor environment with a small temperature difference, it is desirable to have a highly airtight building with little heat in and out inside and outside the building.

◆ Measures against snow
Since it is an area with a lot of snowfall and snowfall, it is necessary to consider what kind of structure the building should have, considering the site and the surrounding environment, assuming snow accumulation on the building.
You should also consider the approach from the road to the entrance of the building and the snow removal measures for the parking lot.

◆ Measures for solar radiation and ventilation
In the summer, it is necessary to consider shielding the sunlight and ventilation as a measure against the heat, but in the winter, taking in the heat of the sunlight to keep the room temperature can reduce the amount of energy used. Consider controlling solar radiation according to the season.
 

The following figure shows the energy consumption by household use and the annual energy payment amount per household in Hokkaido (estimated value).

The energy consumption is high for heat energy used for heating and hot water supply, and power and other power energy including lighting.

　

According to the results of the Ministry of the Environment survey in 2018, the annual energy cost per household in Hokkaido is 225,000 yen, which is the national average. It is about 1.3 times that of (174,000 yen). In Hokkaido, which is a cold region with snow, it can be seen that a large amount of money is spent on utility bills.

Improving the energy performance of a building has various merits such as cost reduction and health as well as environmental aspects such as reduction of CO2 emissions.
 

<Life cycle cost reduction>
The higher the insulation performance of a building, the higher the construction cost, but the energy consumption is reduced and the monthly utility cost is lower than before.
Therefore, we have organized the construction costs and annual heating and cooling costs when the insulation performance level is divided into three ranks as shown in the following table using data in Hokkaido. In addition, the following graph compares the total amount of expenditure (life cycle cost) by accumulating the construction cost and the annual heating and cooling costs. The construction cost of a high-performance standard house is more than 1 million yen higher than the minimum, but by reducing the annual heating and cooling expenses,Total amount reversed in about 20 yearsWill be.
 
While making a financial plan for how much construction costs can be prepared, we will proceed with consideration of what level of performance the building will have to reduce monthly utility costs.
　ニセコ町としては、温室効果ガスの排出削減のため、スタンダード（高性能）以上の断熱性能の建物が望ましいと考えています。

The basic procedure for considering new construction or renovation of a building with high energy performance is explained together with related technologies such as energy saving technology (in the main text of the manual).
To summarize the idea in an easy-to-understand manner, it is advisable to consider in the order of "1. Energy utilization perspective" and "2. Renewable energy introduction perspective" as shown in the following figure.

　1.エネルギー利用の観点においては、まず、建物の構造や形を工夫し、日射や外気をうまく取り入れることによって、断熱性能が高くエネルギー損失の少ない建物にすることを検討します。つまり、必要とするエネルギーの量ができる限り少なくて済むようにし、CO2排出量を抑えるということです。

Next, we will consider improving the efficiency of equipment such as air conditioners, lighting, and hot water supply, that is, introducing equipment that can be used efficiently with a small amount of energy. At that time, it is important to select equipment with the capacity that matches the size and structure of the building. If the equipment is overcapacity, it will consume more energy than necessary.

In this way, after devising ways to use less energy, we will consider it from the perspective of 2. Renewable energy introduction.

Incorporating technologies to use renewable energy as an alternative to fossil fuels can further reduce the CO2 emitted by the use of fossil fuels.
 

You can download the text of the manual from the following.
Niseko Town anew when to build a building in, by all means, please refer to.