VIETHA LTD.,CO pillow plate ice storage

pillow plate ice storage

Phase 2 · Engineering Pre-Design · v0.8.0-rc7

Pillow Plate Ice Storage Pre-Design Module

Engineering pre-design module for ice storage tanks using stainless pillow plates + glycol/water secondary loop. This version adds hourly charge/discharge operating schedule modeling, a professional engineering report, a calculation-basis appendix, and compare-only vendor data review. Not for fabrication drawings or performance guarantees.

Clean baseline: v0.8.0-rc7 uses glycol/water secondary loop only. DX/Freon is not included in this phase. Heat-transfer and hydraulic assumptions are visible and editable; no hidden coefficients are used.
Active sample: 100 kWh. Choose another sample or edit any input to use a custom configuration.
1Storage target
Use kWh of cooling / ton-hour for the storage tank.
kWh
Useful cooling delivered to the load.
h
h
Example: 00:00–06:00.
%
2Ice / tank / plate layout
mm
15–20 mm is typical for concept screening.
%
Used for indicative tank volume.
%
×
m
m
mm
Ice bridge check = 2δ/spacing.
pcs
0 = auto. Use this to check an actual installed layout.
3Tank layout / plate arrangement
banks
1 = one parallel stack. More banks increase tank length.
pcs
0 = auto from required plates / banks.
mm/plate
Visible allowance for plate thickness/bulge; edit per fabrication data.
m
m
For headers/nozzles/access; both ends included in calculation.
m
Both sides included.
m
m
Layout model: simple rectangular tank envelope for pre-design. It does not replace fabrication drawings. All clearances are visible inputs, declared design parameters.
4Glycol properties
Preset fills editable starting values only; it is not certification.
%
kJ/kg.K
kg/m³
Pa.s
Very sensitive at sub-zero temperature.
W/m.K
K
Example: -8°C → -5°C.
°C
Property discipline: Phase 2 still uses engineer-entered/editable properties. MPG/MEG presets are starting values for preliminary sizing and do not replace glycol datasheets or CoolProp/REFPROP validation.
5Pillow plate hydraulic pre-design
Not a validated pillow-plate ΔP correlation.
pcs
0 = use installed plate count.
pass
Passes increase equivalent flow length, not flow split.
m/pass
mm
cm²
Visible assumption. Use vendor/test geometry when available.
K
Use percent for screening; manual when header/manifold ΔP is estimated separately.
% of plate ΔP
kPa
0 = use allowance percentage.
kPa
Only used when model = manual total ΔP.
min m/smax m/s
kPa
%
Hydraulic scope: Darcy–Weisbach style equivalent-channel estimate for screening only. Plate ΔP, header allowance and total ΔP are shown separately. Flow distribution is not verified without real manifold design/test data.
6Vendor data mode
Vendor values are kept separate for QA comparison; they do not override calculation unless a future locked vendor model is added.
kWh
kW
kPa
Use only if vendor/test value is available.
Vendor data discipline: this mode is for comparison and QA traceability. It does not convert the generic model into a validated vendor correlation.
7Operating schedule / charge-discharge model
Creates an hourly design-day load shape from the net storage target.
h
h
%
Usually 0% at the start of the night charge cycle.
h
h
kW
0 = chiller off during occupied period; storage carries the load.
kW
0 = no explicit cap; use storage inventory as the cap.
Operating schedule basis: hourly pre-design balance only. It checks charge window, discharge support and remaining storage inventory; it is not a controls sequence or calibrated building load simulation.
8Heat transfer / chiller
Auto uses equivalent-channel correlations — preliminary only.
W/m²K
W/m²K
Engineering assumption; sensitivity check is required.
K
mm
W/mK
W/mK
RT
×
COP
Available deliverables: engineering report PDF and calculation-basis appendix PDF.
RKey results
Storage & plate sizing
Tank layout / plate arrangement
Glycol / hydraulic / chiller
Operating schedule / hourly charge-discharge balance
Hourly operating schedule detail
Charge curve visualization

Charge power vs ice thickness

Cumulative charge time vs ice thickness

The chart shows charge power falling as ice thickness increases. This is a layer-by-layer quasi-steady estimate, not transient Stefan validation.
Charge-curve detail table
Warnings / gates
Vendor data comparison
Calculation basis
Engineering report
Pillow Plate Ice Storage Pre-Design v0.8.0-rc7 · Baseline: glycol/water secondary loop only · No DX/Freon in Phase 2 · Preliminary engineering only · Vendor data is compare-only.