# Comparison of deuterium pressure and vacuum pumping in 2020-06-02-r08 experiment

• Hang Zhang sent me this message a short time ago, at 2 o'clock in the morning his time. I messaged back: 'Are you awake?!?' He said yes, he is working. That's the kind of dedication people bring to cold fusion, by golly.

I am forwarding it here with permission.

In this test, the calorimetry is confirmed with three different methods at the same time. I like that kind of redundancy.

- Jed

好久未联系，还好吗。

I haven't been in touch for a long time. How are you.
最近世界各国疫情都很严重，您那里情况怎样，注意保护健康。
The epidemic situation in the world is very serious recently. What's the situation there? Pay attention to health protection.
我这边实验仍然正常进行。
My experiment is still going on normally.
这几天可以观察到一些多余热功率
Some excess thermal power can be observed these days
我发现一个现象，抽真空时的多余热功率，大于容器氘气压力2千帕时的多余热功率。
I found a phenomenon that the excess thermal power in vacuumizing is greater than that in the case of 2 kPa deuterium pressure.
如下图
As shown below:

这个多余热功率是计量误差还是真实的，
Is this excess thermal power measurement error or real,
我对数据进行了分析计算
I analyzed and calculated the data
量热计有三种量热法
There are three calorimetric methods for calorimeters
1、塞贝克电压量热法
1. Seebeck voltage calorimetry
2、量热计冷却水进出水温差量热法
2. Calorimeter cooling water temperature difference calorimetry
3、量热计内空气温度与冷却水进水温差量热法
3. Differential calorimetry of air temperature and cooling water inlet temperature in calorimeter
我用三种方法对测量数据进行了计算
I calculated the measured data in three ways
见下图
See the figure below

从以上分析可以看出，
As can be seen from the above analysis,
三种量热曲线趋势基本吻合
The trend of three calorimetric curves is basically the same
可以确认所观察到的多余热功率是真实的。
It can be confirmed that the observed excess thermal power is true.
低气压时的多余热功率较高

High excess thermal power at low air pressure
实验正在继续进行，
The experiment is continuing,
我想办法提高多余热功率。
I'm trying to increase the excess heat power.

祝身体健康
Good health

张航

• Can you refresh my memory, please. Is he one of the Mizuno replicators?

Yes.

• Looks great.

I have few questions :

• What is happening to pressure? I understand that after initial heating, pressure drops because of quick loading in Pd ?
• Do you confirm that no parameter changes during the run?
• Why is there apparent endothermic phase ? Is it a measurement/computation artifact?
• Why is there so great digitization of heat measurement ? are some sensors near their precision limit?

I'm not competent, so some question may look stupid.