냉ㆍ난방 부하계산

<xbody bgcolor="white" text="black" link="blue" vlink="purple" alink="red"> <table border="0" cellpadding="0" cellspacing="0" width="600"> <tr> <td height="20">※ 냉ㆍ난방 부하계산 </td> </tr><tr> <td height="20">1.1 난방부하계산</td> </tr><tr> <td height="20" valign="bottom">1.1.1 난방부하 요인</td> </tr><tr> <td height="20"> <table border cellpadding="3" cellspacing="0" width="500" bordercolordark="white" bordercolorlight="black"> <tr> <td height="21">부 하 종 류</td> <td height="21">부 하 요 소</td> <td height="21">현 열</td> <td height="21">잠 열</td> </tr><tr> <td height="40" rowspan="2">실내 손실열량</td> <td height="20">외벽, 창, 지붕, 바닥, 내벽</td> <td height="20">○</td> <td height="20"></td> </tr><tr> <td height="20">극간풍</td> <td height="20">○</td> <td height="20">○</td> </tr><tr> <td height="20">기기 손실열량</td> <td height="20">덕트</td> <td height="20">○</td> <td height="20"></td> </tr><tr> <td height="20">외기 부하</td> <td height="20">환기, 극간풍 </td> <td height="20">○</td> <td height="20">○</td> </tr></table></td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="600"> <tr> <td height="20">1.1.2 난방부하 계산 </td> </tr><tr> <td height="20" align="left"> <table border="0" cellpadding="0" cellspacing="0" width="500"> <tr> <td><img src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.meck.or.kr%2Fkisul%2Fkisul%2Fkisul_data%2Fdata%2F12_29%2Fimages%2Fphoto_135.gif" width="323" height="481" border="0"></td> </tr></table></td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="600"> <tr> <td width="37" height="17">(1) </td> <td height="17" colspan="2">외벽체로 부터의 손실부하</td> </tr><tr> <td width="37" height="17"></td> <td height="17" colspan="2">qs = KㆍAㆍ?tㆍk… … … (1-1)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">K : 구조체의 열관류율 (Kcal/m²＇h＇℃)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">A :구조체의 면적 (m²)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17">?</td> <td width="478" height="17">t : 실내외 온도차 (℃)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">k :방위계수 </td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">qs :외벽체의 손실열량 (kcal/h) </td> </tr><tr> <td width="37" height="17">(2) </td> <td height="17" colspan="2">내벽체로부터의 손실부하</td> </tr><tr> <td width="37" height="17"></td> <td height="17" colspan="2">qi = KㆍAㆍ?t … … … … … (1-2)</td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="600"> <tr> <td width="37" height="17">(3) </td> <td height="17" colspan="2">지면과접하는 부위의 손실부하</td> </tr><tr> <td width="37"></td> <td height="17" colspan="2">지면과 접하는 부분은 특별히 다음과 같은Perimeter fator법에 의해 손실열량을</td> </tr><tr> <td width="37"></td> <td height="17" colspan="2">계산하기도 한다.</td> </tr><tr> <td width="37" height="17"></td> <td height="17" colspan="2">qp = F2ㆍPㆍ( ti - to ) … … … … … (1-3)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">qp : 외주부(Perimeter)의 손실열량 (W)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">F2 : 열손실계수 (W/℃ㆍm) → (Table-5 참조)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">P : 외주부 길이 (m)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">ti : 실내온도 (℃)</td> </tr><tr> <td width="37" height="17"></td> <td height="17"></td> <td height="17">to : 외기온도 (℃)</td> </tr><tr> <td width="37" height="17"></td> <td height="17">＊</td> <td height="17">ASHRAE FUNDAMENTAL 1989 25. 7 참조.</td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="600"> <tr> <td width="37" height="17">(4) </td> <td height="17" colspan="2">극간풍에 의한 손실열량</td> </tr><tr> <td width="37"> </td> <td height="17" colspan="2"><table border="0" cellpadding="0" cellspacing="0" width="300"> <tr> <td width="29" height="17"></td> <td width="271" height="17">가습이 필요한 경우 가습부하 </td> </tr><tr> <td width="29" height="17"></td> <td width="271" height="17">↓</td> </tr></table></td> </tr><tr> <td width="37"></td> <td height="17" colspan="2">qinf = qls + qil</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">≒ r × Cpo × Qi × (ti -to) + r × 597.5 × Qi × (Xi-Xo)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">≒0.29ㆍQiㆍ(ti -to) + 717ㆍQiㆍ(Xi-Xo) … … … (1-4)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">qinf :극간풍에 의한 손실열량 (Kcal/h) </td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">Qi :극간풍량 (m³/h)</td> </tr><tr> <td width="37" height="17"></td> <td width="85" height="17"></td> <td width="478" height="17">ti, to : 실내, 실외온도 (℃)</td> </tr><tr> <td width="37" height="17"></td> <td height="17"></td> <td height="17">Xi,Xo : 실내,실외 절대습도 (kg/kg') </td> </tr><tr> <td width="37">(5) </td> <td height="17" colspan="2">외기도입으로 인한 손실열량 (환기)</td> </tr><tr> <td width="37"></td> <td height="17" colspan="2">환기를 목적으로 하는 외기도입으로 인한 손실열량의 계산식은 극간풍에 의한 손 </td> </tr><tr> <td width="37"></td> <td height="17" colspan="2">실열량 계산법 식 (1-4)와 같다.</td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="580"> <tr> <td height="18">Table5 Heat Loss Coefficient F₂of Slab Floor Construction,W/(m²ㆍ℃per m of perimeter)</td> </tr></table> <table border cellpadding="2" cellspacing="0" width="580" bordercolordark="white" bordercolorlight="black"> <tr> <td height="50" rowspan="2">Construction</td> <td height="50" rowspan="2">Insulation</td> <td height="25" colspan="3">Kelvin Days(18℃Base)</td> </tr><tr> <td width="90" height="25">4130Kㆍd/y</td> <td width="89" height="25">2970Kㆍd/y</td> <td width="84" height="25">1640Kㆍd/y</td> </tr><tr> <td width="144" height="25">200mm block wall, brick facing</td> <td width="181" height="25">Uninsulated R= 0.95 from edge to footer</td> <td width="90" height="25">1.07 0.83 </td> <td width="89" height="25">1.17 0.86 </td> <td width="84" height="25">1.24 0.97 </td> </tr><tr> <td width="144" height="25">100mm block wall, brick facing</td> <td width="181" height="25">Uninsulated R= 5.4 from edge to footer</td> <td width="90" height="25">1.38 0.81 </td> <td width="89" height="25">1.45 0.85 </td> <td width="84" height="25">1.61 0.93 </td> </tr><tr> <td width="144" height="25">Metal stud wall, stucco </td> <td width="181" height="25">Uninsulated R= 0.95 from edge to footer</td> <td width="90" height="25">1.99 0.88 </td> <td width="89" height="25">2.07 0.92 </td> <td width="84" height="25">2.32 1.00 </td> </tr><tr> <td width="144" height="25">Poured concrete wall with duct near perimeter </td> <td width="181" height="25">Uninsulated R= 0.95 from edge to footer 910mm under floor</td> <td width="90" height="25">3.18 1.11 </td> <td width="89" height="25">3.67 1.24 </td> <td width="84" height="25">4.72 1.56 </td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="580" height="17"> <tr> <td height="17">R values in ℃ㆍm²/W.</td> </tr><tr> <td height="17">Weighted average temperature of the heating duct was assumed at 43℃during the heating season (outdoor air temperature less than 18℃)</td> </tr></table> <table border="0" cellpadding="0" cellspacing="0" width="498"> <tr> <td><img src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.meck.or.kr%2Fkisul%2Fkisul%2Fkisul_data%2Fdata%2F12_29%2Fimages%2Fphoto_137.gif" width="450" border="0"></td> </tr></table>   </xbody>