side projects

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Peppers ghost clock (top flat or pyramid?)

Infinity mirror

Lamp where the with two lights with thin paper as the shades where the center piece is suspended be a piece of walnut that is held up on both sides by other walnut pices that are in a maple stand

Book shelf where the amount of overhang on the shelf is based off of the size of the book that is supposed to go in that spot

Ceiling light that points upwards to a convex mirror that reflects the light and is suspended by wires or pieces of wood

3-5 leg lamp

Inside wood different than outer

Outside pieces hold the shade and the bulb is on the middle piece

Pieces holding it up are thin and linked together with a third? wood

Base is a mix of the main two (all three?) woods

Light color modification

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Using gel filters for changing light color⁠

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Lighting 103: use gels to tune your home’s lighting⁠

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Color correction⁠

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Color Temperature Orange (CTO)

Color Temperature Blue (CTB)

HVAC

HVhACk: more sustainable HVAC, uses windows and natural air flow

Window Controllers:

Sensors: BLE devices w/ temp, pressure, humidity sensors

Window Controller

Features

Automatic opening and closing of the window

IoT/Bluetooth connectivity

Additional

Stand for fan

Blind opener/closer (use the same motor?)

Components:

Motor

Microcontroller

Humidity

Plug (or battery)

Curtains

Purpose: regulate the temperature between areas/open up flow

Secondary:

Collaboration:

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Switchbot Curtain⁠

($100): open API curtain opener/closer

Competition

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Quoya Smart Curtains⁠

($240-300): new system

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Slide⁠

($350): retrofit

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Orvibo⁠

($???): retrofit, entire home jawn

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OlideSmart Curtain⁠

($190-260): new system

Engineering

Units

Quantity

CFM: cubic feet per minute, flow rate

Energy

Watt-hour (Wh): a measure of electrical energy equivalent to a power consumption of one watt for one hour

British Thermal Units (BTU): amount of energy necessary to raise the temperature of one amount of water from 60F to 61F

MBH: thousands BTU’s per hour

Metrics

Efficiency:

Coefficient of Performance (COP): ratio of thermal output (heating or cooling) to energy input

Energy Modeling

Yearly weather profile

Operating schedules

Building envelope conditions

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Building Energy Modeling 101: HVAC Design and Operation Use Case⁠

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Modeling and Simulation of Residential HVAC Systems Energy Consumption⁠

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% savings=1-SEERcurrentSEERcurrent*100% *only applies if rated cooling output and operating schedules remain the same after upgrade, otherwise energy consumption in kWh must be calculated separately for existing and projected running conditions

Air Conditioning

Types of Air Conditioners

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Ductless Mini-Split⁠

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Energy Saver 101 Infographic: Home Cooling⁠

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10 Questions to Ask Before Repairing or Replacing Your Air Conditioner⁠

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Energy Star Most Efficient 2020 (AC and Air Source Heat Pumps)⁠

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Types

Coolant

R-410a: New standard, more efficient, no ozone damage, operates at higher pressures, requiring use of tougher and more durable parts, increasing life of system.

R-22 (freon): Old standard, now illegal in any system manufactured after 2010, no longer imported or manufactured after 2020. Less energy efficient (absorbing and releasing heat), contributes to depletion of ozone, rising prices.

Metrics

Efficiency: ratio of cooling output (BTU) to heating input (watt-hours) (unit = BTU/Wh)

Energy Efficiency Ratio (EER): fixed set of operating conditions (Tindoor = 80F, Toutdoor = 95F, relative humidity = 50%)

Seasonal Energy Efficiency Ratio (SEER): averages performance across a range of outdoor temperatures typical of the cooling season.

Degradation

Estimated Capacity: BTU/Hr

US DOE: 3% degradation for unmaintained, 1% for completely maintained systems

Florida Test: median 5.2%

degradation=-0.0454+0.00269(Age)+0.030(Tons)-0.00127(SEER)

Degradation = -0.0454

Heating

Metrics

Efficiency:

Heating Seasonal Performance Factor (HSPF): analogous to SEER, applies for heat pumps in heating mode only

SEER: describes heat pumps during cooling season

Annual Fuel Utilization Efficiency (AFUE): used for combustion-based appliances (boilers, furnaces), ratio of effective heating output to total energy contained in the fuel consumed

Cannot compare w/ the HSPF. Would have to estimate yearly running costs,

comparing the cost of the fuel consumed by the boiler or heater w/ the cost of the electricity consumed by the heat pump⁠

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Evaluation of Air Conditioning Performance Degradation: Opportunities from Diagnostic Methods⁠

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Summary⁠

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Performance Metrics of Heating and Cooling Equipment⁠

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Unimotor

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idea logidea log

Light color modification

HVAC

Window Controller

Curtains

Engineering

Air Conditioning

Heating

Unimotor

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