more formatting

Author: CamDavidsonPilon

_posts/2021-09-07-design-of-the-koji-room-koji-muro.md

@@ -132,9 +132,11 @@ Next, let's consider the requirements for **moisture removal**. About 80% of the
 ![](/assets/images/koji_room/03kojiroomwater.png)
 
 Finally, let's consider the requirements for **carbon dioxide removal**. Koji has a respiratory coefficient of around 1.0 throughout its entire process, which means that the koji's peak heat generation of 1623W equates to a CO₂ generation rate of 0.3m³ CO₂/h (see Appendix - Step 6) using the aerobic metabolism equation:
+
 $$
 C_6H_{12}O_6+6O_2 \rightarrow 6CO_2 +6H_2O+2872kJ/\text{mol} \cdot \text{glucose}
 $$
+
 If we maintain an indoor carbon dioxide concentration at 4500ppm, which is 500ppm below the OSHA Permissible Exposure Limit (PEL = 5000ppm), and assume an outdoor CO₂ concentration of 500ppm, we can show that the flow rate necessary to remove all generated carbon dioxide is **76m³/h.**
 
 ![](/assets/images/koji_room/04kojiroomCO2.png)
@@ -144,15 +146,15 @@ Comparing the three ventilation rates, we can see that **moisture removal**, at
 
 ### 4. Heating
 
-Knowing that our maximum ventilation rate will be **119m3/h**, let's size the heating panels of the koji-room. Our conductive heat losses are 764W, and ventilating fresh air at 119m3/h removes 2480W of heat. Our koji generates 1623W of heat at its peak, so our heater must provide at least 1621W of heat (see Appendix - Step 7):
+Knowing that our maximum ventilation rate will be **119m³/h**, let's size the heating panels of the koji-room. Our conductive heat losses are 764W, and ventilating fresh air at 119m³/h removes 2480W of heat. Our koji generates 1623W of heat at its peak, so our heater must provide at least 1621W of heat (see Appendix - Step 7):
 
 ![](/assets/images/koji_room/05kojiroomfinal.png)
 
-And that's it! At t=0h, our heaters will be running at 764W and our ventilation turned off; and at the peak of growth, our heaters will be running at 1459W and our ventilation at 119m3/h. This is our operating window, and every other point in time will fall somewhere between these two extremes. Achieving steady conditions is the job of whatever **control system** we select. This can range from a basic thermostat and humidistat to a programmable controller.  
+And that's it! At t=0h, our heaters will be running at 764W and our ventilation turned off; and at the peak of growth, our heaters will be running at 1459W and our ventilation at 119m³/h. This is our operating window, and every other point in time will fall somewhere between these two extremes. Achieving steady conditions is the job of whatever **control system** we select. This can range from a basic thermostat and humidistat to a programmable controller.
 
 ### Design Notes 
 
-Engineering is all about precise calculations, then applying a bunch of somewhat arbitrary safety factors, gut intuition, and hoping your control system is tuned well enough. In the example above, I would install an exhaust fan capable of 150m3/h, and heater of 2000W, depending on what's available from the vendor. 
+Engineering is all about precise calculations, then applying a bunch of somewhat arbitrary safety factors, gut intuition, and hoping your control system is tuned well enough. In the example above, I would install an exhaust fan capable of 150m³/h, and heater of 2000W, depending on what's available from the vendor.
 
 One interesting observation is that, since moisture removal is the limiting factor during the peak of koji growth, we can demonstrate that humidification is not required during koji-making except for the initial stages (by the same logic, if heat removal was the limiting factor, we would not require any heating and would have to supplement humidity). 
 
@@ -194,8 +196,6 @@ Here's an example of the tent-type koji-making machine:
 
 
 ![](/assets/images/koji_room/Tentclosed.png){:height="550" .center}
-
-
 *Top to bottom: tent-type koji machine schematic, with the cloth tent removed, and with the cloth tent attached - from Hakuyo Co., Ltd.*
 
 Here's a simpler box-type koji-making machine, which does not recirculate any air:
@@ -427,8 +427,8 @@ CO_2 \text{ generated by koji} = CO_2 \text{ removed by ventilation}\\
 $$
 Where,
 
- - $m_{CO₂,koji}$  = CO₂ generated by koji (m3/h)
- - V(dot) = ventilation flow rate (m3/h)
+ - $m_{CO₂,koji}$  = CO₂ generated by koji (m³/h)
+ - V(dot) = ventilation flow rate (m³/h)
  - C₁ = concentration of CO₂ inside koji room (fraction)
  - C₂ = concentration of CO₂ outside (fraction)